The Gingivae Are Painful and Erythematous

The gingivae are painful and erythematous. The interdental papillae appear as punched-out, necrotic, cratering areas. The overall sloughing of the necrotic tissue appears as a pseudomembrane over the tissues. The patient experiences a foul odor and metallic taste. On the basis of these features you suspect that this patient has:

A) acute marginal gingivitis.
B) primary herpes infection.
C) necrotizing ulcerative gingivitis.
D) pseudomembranous candidiasis.