请教feifei逻辑中的62题

62. Brushing your teeth regularlyno matter which toothpaste you use, will reduce your chances of tooth decay.Scientists have concluded that, when you brush, you reduce tooth decay byremoving the film of plaque血小板that forms on teeth and gums. So, you can forget about fluorides: brush yourteeth carefully and say goodbye to cavities.

Which one of the following is a criticism of thereasoning in the argument?

(A) Brushing with fluoridetoothpaste has been shown to reduce tooth decay.

(B) The fact that brushing will reduce tooth decay does notshow that fluorides are of no value.

(C) Few people adequately remove plaque by brushing.

(D) People have plaque on theirteeth most of the time.