Problem: Continue the following story.

After Craig solved the difficult math problem, he showed Justin the solution. 
OPTIONS:
- Craig was proud of himself.
- Justin was proud of himself.
Here's how I want to continue it: Craig was proud of himself.

Problem: Continue the following story.

Christine was working online on the computer that Mary dropped a bowling ball onto. 
OPTIONS:
- Christine  broke the computer.
- Mary  broke the computer.
Here's how I want to continue it: Mary  broke the computer.

Problem: Continue the following story.

Supplements were helping with Mike's depression where regular pills had failed. This is due to the 
OPTIONS:
- supplements being a fake drug.
- pills being a fake drug.
Here's how I want to continue it:
pills being a fake drug.