Problem: Continue the following story.

Following the advice from the chef, Mary used a wooden cutting board to cut meat instead of a plastic cutting board, even though the 
OPTIONS:
- wooden cutting board is nonporous.
- plastic cutting board is nonporous.
Here's how I want to continue it: plastic cutting board is nonporous.

Problem: Continue the following story.

Christopher taught Aaron how to ask a girl to homecoming without failure as 
OPTIONS:
- Christopher is an introvert.
- Aaron is an introvert.
Here's how I want to continue it: Aaron is an introvert.

Problem: Continue the following story.

Christopher told Samuel that he could help him build a composter this weekend.  
OPTIONS:
- Christopher was generous.
- Samuel was generous.
Here's how I want to continue it:
Christopher was generous.