[Q]: How does the sentence end?

Emily was installing Samantha's new software for their computer because
OPTIONS:
- Emily knew how to do it.
- Samantha knew how to do it.

[A]: Emily knew how to do it.

[Q]: How does the sentence end?

The couple drank wine out of glasses instead of mugs, because the
OPTIONS:
- mugs were clean.
- glasses were clean.

[A]: glasses were clean.

[Q]: How does the sentence end?

The new deck wouldn't fit behind the house because the
OPTIONS:
- deck was just not long enough.
- house was just not long enough.

[A]:
deck was just not long enough.