D.)personification because grey walls do not normally frown
Answer: abuse, a waste of time, animal endangerment, it affects the earth
Explanation: Animal experiments prolong the suffering of humans waiting for effective cures because the results mislead experimenters and squander precious money, time, and other resources that could be spent on human-relevant research. Animal experiments are so worthless that up to half of them are never even published
Answer:
even-handedness or impartiality
The correct answer should be choice A .... not sure
We can't see underlining here, but here, I think this will be helpful:
"I read a novel" would be the intependent clause: it does not need the other one to be complete.
"until the guests arrived" is the subordinate clause: it needs the independent, main clause to be complete.
