Problem: How does the sentence end?

The storage locker of Kevin was a lot bigger than that of Ryan, by reason of
Answer: Ryan having less stuff.

Problem: How does the sentence end?

John entered the recording studio and silenced the bell before he played the flute, because the
Answer: flute was required for song.

Problem: How does the sentence end?

Katrina wanted their hair done for a wedding and Elena was the best hair stylist, so
Answer: Katrina booked an appointment time.

Problem: How does the sentence end?

Adam showed up empty-handed to the housewarming party, while Joel brought a gift, because
Answer:
Adam was rude.