Answer:
in pretty sure it's D
usually codes and symbols
Jason reported (that) only one percent of the Earth's water is fresh.
I believe the answer is to get a complete impression of the person.
It’s not to force the interviewee to give straight answers because they might be more stressed.
It’s not to give the interviewee time to think over questions because that would make more sense to give them a paper to fill out as an interview.