She on the project for 2 days before she finished it.
answers a - has worked
b - had been working
c - is working
d - was working

She had been working on the project for 2 days before she finished it. So B is the only right one as it's a continuous action before an action with an exact defining past perfect continuous. Also there's a key word "for" that can help us to find out the tense.

Metaphor

Explanation: This is because he didn't really take from the recreation area