[Q]: How does the sentence end?

Cynthia didn't know anything about physics but Laura did because 

[A]: Cynthia was less smart at science.


[Q]: How does the sentence end?

The bread Sarah made was lighter than the bread Monica made because 

[A]: Sarah kneaded the dough the perfect amount.


[Q]: How does the sentence end?

Metal chopsticks tend to be shorter than wood ones. Jake preferred the 

[A]:
metal ones for being compact.