It made a huge difference, so he used the bench instead of the seat, because the 
OPTIONS:
- seat was easy on the back.
- bench was easy on the back.
bench was easy on the back.

They would have trouble becoming catholic from their start of being protestant, since the 
OPTIONS:
- catholic religion is stricter.
- protestant religion is stricter.
catholic religion is stricter.

Randy constructed an elaborate sound proof room for Brian, because 
OPTIONS:
- Randy was a sound engineer.
- Brian was a sound engineer.

Randy was a sound engineer.