The correct answer is C. "People who support animal testing are crazy."
This is an example of an ad hominem fallacy because the thesis states that animal testing is valuable, which insinuates that the person making the claim believes in animal testing. By claiming that "people who support animal testing are crazy" is making a statement about the person himself rather than about the argument. The sentence is stating that the person who supports animal testing is crazy rather than explaining a counter-argument about the topic.
You can use gestures to emphasize key points. Volume and tone both include verbal so it isn't those, and then pace is how fast you move which usually doesn't affect key points.
you didnt add the excerpt but the definition of idiom is a group of words established by usage as having a meaning not deducible from those of the individual words or a characteristic mode of expression in music or art.
