3. ** The first manifestations of gingival inflammation are
vascular changes consisting
of dilated capillaries and increased blood flow. These initial inflammatory changes
occur in response to the microbial activation of resident leukocytes and subsequent
stimulation of endothelial cells. Clinically, this initial response of the gingiva to bacterial plaque, i.e. subclinical gingivitis, is not apparent. It is:
A. Stage I gingival inflammation: The initial lesion.
B. Stage III gingival inflammation: The established lesion.
C. Acute Gingivitis.
D. Chronic gingivitis