请问2000年8月阅读的第45提选什么呢

bettyofarim

请问2000年8月阅读的第45提选什么呢?
题目: which of the following  was  a method used by  some potters to give vessels a  glossy finish ?
A. smoothing them with wet hands
B.mixing the clay  with colored solutions
Cbaking them at a very high temperature
.Drubbling them with a smooth hard object
现在我发现有的书上答案是A,有的是D .但是我觉得是C ? 因为原文中提到:
a glaze is  a form of  slip that  turns  to a glasslike finish during hight temerature  firing .
不知道哪个对?