Problem: How does the sentence end?

I m trying to better myself by developing positive thinking and removing negativity from my life but the
OPTIONS:
- negativity is too strong.
- positive thinking is too strong.
Answer: negativity is too strong.

Problem: How does the sentence end?

Tanya wanted to return the found wallet to the owner, but Jessica argued that they should keep the money, because
OPTIONS:
- Tanya was less ethical.
- Jessica was less ethical.
Answer: Jessica was less ethical.

Problem: How does the sentence end?

The roast burned in the oven, so he tried the furnace instead, as the
OPTIONS:
- oven had manageable heat.
- furnace had manageable heat.
Answer: furnace had manageable heat.

Problem: How does the sentence end?

Tanya's homemade bird food was better than Jennifer because
OPTIONS:
- Tanya remembered to include sunflower seeds.
- Jennifer remembered to include sunflower seeds.
Answer:
Tanya remembered to include sunflower seeds.