Christine hated the heat, but Mary loved it, so 
OPTIONS:
- Christine was thrilled when they went on vacation in Africa.
- Mary was thrilled when they went on vacation in Africa.
Mary was thrilled when they went on vacation in Africa.

He liked keeping a gun at his residence more than an alarm system, because the 
OPTIONS:
- alarm system made him feel safe.
- gun made him feel safe.
gun made him feel safe.

Betty asked Maria to buy her some popcorn at the movies because 
OPTIONS:
- Betty had no money.
- Maria had no money.
Betty had no money.