The correct answer is B . Hope this helps!
Stern is a serious and unrelenting manner usually in a authoritative way while yearns is an intense feeling of longing for someone lost or that you separated from.
It should not be controversial: it would only make the research less reliable since people would have their opinions about the topic that they would want to defend. It should also not be obscure: then it's hard to check.
The best answer is that it should be multifaceted: it should include a number of aspects, not just one, so that the test can check for those aspects, not just one.
The answer is A, because it is telling you that everybody is happy and wants to have that Job.
Brain activity because you don't know what other people think
