Problem: How does the sentence end?

Mary tried a green chemical while Jennifer tried a blue one. When the blue chemical reacted, they discovered 
OPTIONS:
- Mary had the active ingredient.
- Jennifer had the active ingredient.
Answer: Jennifer had the active ingredient.

Problem: How does the sentence end?

He would rather win the ball than the bat at the raffle, because he found the 
OPTIONS:
- ball to be useful.
- bat to be useful.
Answer: ball to be useful.

Problem: How does the sentence end?

I like to use hard luggage rather than soft luggage when I travel because I think the 
OPTIONS:
- hard luggage protect contents less.
- soft luggage protect contents less.
Answer: soft luggage protect contents less.

Problem: How does the sentence end?

I had to communicate the news over the phone or at the restaurant tonight. I told them at the 
OPTIONS:
- phone even though I wanted them to enjoy their evening.
- restaurant even though I wanted them to enjoy their evening.
Answer:
restaurant even though I wanted them to enjoy their evening.