[Q]: How does the sentence end?

Jessica spent less time studying for school than Samantha so
OPTIONS:
- Jessica had worse grades in class.
- Samantha had worse grades in class.

[A]: Jessica had worse grades in class.

[Q]: How does the sentence end?

We used an abacus to calculate rather than a computer, as the
OPTIONS:
- abacus was reliable to do it right.
- computer was reliable to do it right.

[A]: abacus was reliable to do it right.

[Q]: How does the sentence end?

Martha liked to add a tablespoon of sugar instead of a cup to the cake because the
OPTIONS:
- tablespoon made it less sweet.
- cup made it less sweet.

[A]:
tablespoon made it less sweet.