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.
Answer:
She wouldnt know if she was getting robbed or if there was a fire or anything dangerous outside or in her house if she uses the powerful earplugs.
The answer is c. And sings a solitary song. Alliteration is the repeated sound of the first letter/sound in multiple words :)
Answer: B
Explanation: It makes the people think there is something wrong with the way they speak, and there is not.
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