Problem: Angela showed a lot of assertiveness when talking with Elena, because

My choice: Elena tended to be stubborn.

Problem: I couldn't pass my math class even though I hired a private tutor. I guess the

My choice: class was too hard.

Problem: The terms of the work contract suited Joel but not Nelson because

My choice: Nelson was committed to working for a different company.

Problem: The materials needed took 2 months to gather, so we got more nails than boards as the

My choice:
nails were quick to acquire.