Answer: while and however.
Explanation:
The clue showing that contrasts are being made in this paragraph include "while and however".
"Both" is used to show that two things are identified together. "While" simply means whereas and it indicates a contrast. However also indicate contrast that's the things that are explained are different from one another.
Answer:
fail to report (something, especially news or data) fully.
Explanation:
I'm pretty sure its like this?
One sentence example:" athletes are inclined to under-report their use of drugs."