To solve the problem, she threw the ball into the hole as the 
OPTIONS:
- ball was immovable.
- hole was immovable.
hole was immovable.

Mary preferred to sleep in a nightshirt and not in a bra because the 
OPTIONS:
- nightshirt was clean.
- bra was clean.
nightshirt was clean.

The dirty steamer wouldn't fit all the way in the kitchen sink, because the 
OPTIONS:
- steamer was much narrower than it.
- sink was much narrower than it.
sink was much narrower than it.