Dentinal Surfaces Are Rarely Exposed During Root Planing Because the Envelope

Multiple Choice

Dentinal surfaces are rarely exposed during root planing because the envelope of cementum covering the root is quite thick.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct,but the reason is NOT correct.
D) The statement is NOT correct,but the reason is correct.
E) NEITHER the statement NOR the reason is correct.