[Q]: How does the sentence end?

Emily knew exactly how to read the expressions on Jessica's face, because

[A]: Emily was very observant.

[Q]: How does the sentence end?

Ryan liked to send messages on their phone. Jeffrey did not.

[A]: Ryan was very gregarious.

[Q]: How does the sentence end?

Angela gave Samantha plenty of business advice, since

[A]:
Samantha had so little experience with company growth.