Problem: How does the sentence end?

The young boy looked up to Robert less than William because 
OPTIONS:
- Robert was his favorite sports player.
- William was his favorite sports player.
Answer: William was his favorite sports player.

Problem: How does the sentence end?

Natalie is worse at distinguishing shades of color than Elena although 
OPTIONS:
- Natalie is color blind.
- Elena is color blind.
Answer: Elena is color blind.

Problem: How does the sentence end?

Aaron was less careful with his appearance than Ryan because 
OPTIONS:
- Aaron did not work in a professional environment.
- Ryan did not work in a professional environment.
Answer: Aaron did not work in a professional environment.

Problem: How does the sentence end?

The teacher bought more markers than chalk because they had a bigger board for the 
OPTIONS:
- markers .
- chalk .
Answer:
markers .