在进行如图所示的实验或有关装置工作时，由机械能转化为内能的是[ ]

A.

B.

C.

D.

M: I’m really surprised you got an A on the test. You didn’t seem to have done a lot of reading.
W: Now you know why I never missed a lecture.
Q: What contributes to the woman’s high score().

A. Attending every lecture.

B. Doing lots of homework.

C. Reading very extensively.

D. Using test-taking strategies.