The relative pronoun 'who' refers to 'people' which is a subject of this sentence, so the correct answer is C, this is also a subject.
It is definitely not B nor D because those two have negative meanings. It can't be C because excessive means "beyond the usual", which has a slightly negative meaning.
The answer should be A, conversational.
Answer:
A- It can make us feel more confident
Explanation:
Answer:
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