Problem: Continue the following story.

When it comes to being graceful, Katrina is more so than Mary because 
OPTIONS:
- Katrina is more bulky.
- Mary is more bulky.
Here's how I want to continue it: Mary is more bulky.

Problem: Continue the following story.

Matthew started the fundraisers and Eric donated to it, so 
OPTIONS:
- Matthew was successful in giving some money.
- Eric was successful in giving some money.
Here's how I want to continue it: Eric was successful in giving some money.

Problem: Continue the following story.

She would rather teach others to play the guitar than to play the flute since the 
OPTIONS:
- guitar is harder to learn.
- flute is harder to learn.
Here's how I want to continue it:
flute is harder to learn.