[Q]: How does the sentence end?

Brett gave Kyle the mop and told them to mop the floor, because 
OPTIONS:
- Brett usually did less work.
- Kyle usually did less work.

[A]: Kyle usually did less work.


[Q]: How does the sentence end?

When hanging pictures my tool of choice is a hammer over a drill because the 
OPTIONS:
- hammer is heavier and difficult to control.
- drill is heavier and difficult to control.

[A]: drill is heavier and difficult to control.


[Q]: How does the sentence end?

The debt of Robert was massive compared to that of Donald, by reason that 
OPTIONS:
- Robert had many credit cards.
- Donald had many credit cards.

[A]:
Robert had many credit cards.