Problem: How does the sentence end?

Maria was perfectly happy being in a relationship with Tanya, so 
OPTIONS:
- Maria wanted to stay together forever.
- Tanya wanted to stay together forever.
Answer: Maria wanted to stay together forever.

Problem: How does the sentence end?

William wanted Jeffrey to clean his pet snail's shell because 
OPTIONS:
- William knew nothing about snails.
- Jeffrey knew nothing about snails.
Answer: William knew nothing about snails.

Problem: How does the sentence end?

Betty always wasted money while Rebecca maintained a budget, so 
OPTIONS:
- Betty always bought needless things.
- Rebecca always bought needless things.
Answer: Betty always bought needless things.

Problem: How does the sentence end?

The jeep easily prevailed in its clash with the tank, as the 
OPTIONS:
- jeep 's crew was inept at combat tactics.
- tank 's crew was inept at combat tactics.
Answer:
tank 's crew was inept at combat tactics.