[Q]: How does the sentence end?

Because of all of Elena's vocal training, and also since Angela smoked,
OPTIONS:
- Elena had a much shallower breathing pattern.
- Angela had a much shallower breathing pattern.

[A]: Angela had a much shallower breathing pattern.

[Q]: How does the sentence end?

Donald was learning yoga from Jeffrey since
OPTIONS:
- Donald was an expert when it came to yoga poses.
- Jeffrey was an expert when it came to yoga poses.

[A]: Jeffrey was an expert when it came to yoga poses.

[Q]: How does the sentence end?

Donald asked Justin to help with writing the paper since
OPTIONS:
- Donald was skilled at writing.
- Justin was skilled at writing.

[A]:
Justin was skilled at writing.