Commas, Introductory, Adjectives, Parenthetical

Is the following sentence punctuated correctly?

My doctor, who graduated from Harvard University, is very intelligent.

• Yes

• No

What is the nonrestrictive element (or nonessential piece of information) in this sentence?

Pearls which are expensive aren't something I buy very often.

• which are expensive

• pearls

• aren't something I buy very often

• There is no nonrestrictive element in this sentence.

Q. What is the nonrestrictive element in this sentence?

My mother, who had been waiting for the past 30 minutes, was beginning to question where the train was.

• My mother

• who had been waiting for the past 30 minutes

• was beginning to question

• where the train was.

What is the nonrestrictive element in this sentence?

My two brothers Kyle and Jeff are in town for Thanksgiving weekend.

• Kyle and Jeff

• My two brothers

• are in town for Thanksgiving weekend.

• There is no nonrestrictive element in this sentence.

Which answer choice correctly uses commas to set off the nonrestrictive elements in this sentence?

Europa one of Jupiter's moons is covered in ice.

• Europa, one of Jupiter's moons is covered, in ice.

• Europa one of Jupiter's, moons, is covered in ice.

• Europa, one of Jupiter's moons, is covered in ice.

Which answer choice correctly uses commas to set off the nonrestrictive elements in this sentence?

Costa Rica a small Central American country is a major coffee grower.

• Costa Rica a small, Central American, country is a major coffee grower.

• Costa Rica, a small Central American country, is a major coffee grower.

• Costa Rica, a small Central American, country is a major coffee grower.

Which answer choice correctly uses commas to set off the nonrestrictive elements in this sentence?

Sigurd the son of Sigmund was a Norse hero who killed the dragon Fafnir.

• Sigurd, the son of Sigmund, was a Norse hero who killed the dragon Fafnir.

• Sigurd the son of Sigmund, was a Norse hero, who killed the dragon Fafnir.

• Sigurd the son of Sigmund was a Norse hero who killed, the dragon, Fafnir.

Which answer choice correctly uses commas to set off the nonrestrictive elements in this sentence?

Our cat a tabby named Princess loves to lay out in the sun.

• Our cat a tabby named Princess, loves to lay, out in the sun.

• Our cat, a tabby named Princess, loves to lay out in the sun.

• Our cat, a tabby named Princess loves to lay out, in the sun.

Which answer choice correctly uses dashes to set off the nonrestrictive elements in this sentence?

Nick's car a green Subaru was stolen last night.

• Nick's car a green Subaru- was stolen last, night.

• Nick's-car a green Subaru- was stolen last night.

• Nick's car-a green Subaru- was stolen last night.

Which answer choice correctly uses parentheses to set off the parenthetical elements in this sentence?

Miles McSmith 1910-1999 was a famous rock star that my mother adored.

• Miles McSmith (1910-(1999) was a famous rock star that my mother adored.

• Miles McSmith (1910-1999) was a famous rock star that my mother adored.

• Miles McSmith 1910-1999 was a famous rock star (that my mother adored).