[Q]: How does the sentence end?

The engineer had to take the pressure off of the box from the ball because the

[A]: ball was too heavy.

[Q]: How does the sentence end?

Katrina yelled at Elena because

[A]: Katrina saw muddy footprints all over the new white carpet.

[Q]: How does the sentence end?

Emily had an easier time making friends than Rebecca because

[A]:
Rebecca was very unapproachable at the party.