Toothbrush wear (i.e., splayed, bent, or broken bristles) is influenced more by the brushing method than by the length of time of brushing. The wear is influenced more by the method than by the number of toothbrushings per day
A) First statement is true, second statement is false.
B) First statement is false, second statement is true.
C) Both statements are true.
D) Both statements are false.
C
Explanation: C) Toothbrush wear (i.e., splayed, bent, or broken bristles) is influenced more by the brushing method than by the length of time of brushing. The wear is influenced more by the method than by the number of toothbrushings per day.
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