Problem: How does the sentence end?

The model car that she built would not fit on the shelf because the 
OPTIONS:
- car was too big.
- shelf was too big.
Answer: car was too big.

Problem: How does the sentence end?

When picking exercise, both the treadmill and weight bench are good for you although when using the 
OPTIONS:
- treadmill your heart will beat slower.
- weight bench your heart will beat slower.
Answer: weight bench your heart will beat slower.

Problem: How does the sentence end?

Aaron was heating the sugar mixture in a pot on the stove. He made a real mess because the 
OPTIONS:
- pot was too small.
- mixture was too small.
Answer: pot was too small.

Problem: How does the sentence end?

They were going shopping for hats instead of going for socks because the 
OPTIONS:
- hats were harder.
- socks were harder.
Answer:
socks were harder.