pradeepkaushal9518 wrote:Question #9 (incorrect)
The attrition of tooth enamel stems from erosion, which occurs only when teeth grind against hard substances. Therefore, those who regularly clench or grind their teeth together will suffer higher rates of enamel attrition than those who do not.
Which of the following most strongly supports this argument?
(A) Tooth enamel can be chipped in sports accidents.
(B) Grinding and clenching both have the same effect on tooth enamel.
(C) Tooth enamel is an extremely hard substance.
(D) Most people do not grind or clench their teeth together.
(E) Front teeth are more likely to grind against one another than back teeth are.
C is perfectly fine here.
Clenching and grinding cause erosion, but erosion can happen when teeth grind against hard substances.
that means teeth have hard enamel.
Wonderful question.
