Multiple Choice
All brands of manual toothbrushes are essentially the same.The main disadvantage of the manual brush is that efficacy is dependent upon the ability and technique of the user.
A) Both statements are true.
B) Both statements are false.
C) The first statement is true; the second is false.
D) The first statement is false; the second is true.
Correct Answer:

Verified
Correct Answer:
Verified
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