Problem: How does the sentence end?

The new paint  won't fit in the box because the 
Answer: box is too short.

Problem: How does the sentence end?

Carrie put essential oils in the diffuser instead of in the candle burner, because the 
Answer: diffuser put out safer fumes.

Problem: How does the sentence end?

The pill made Griffin much more sleepy at bedtime than the tea, because the 
Answer: pill was potent.

Problem: How does the sentence end?

Dennis approached Brett even though he was all the way on the other side of the room because 
Answer:
Dennis was intrigued by him.