Rob this time built the staircase using stone instead of wood because the 
OPTIONS:
- stone was on sale.
- wood was on sale.
stone was on sale.

The program that I was involved in is easier than the policy from last year, because the 
OPTIONS:
- program had fewer steps.
- policy had fewer steps.
program had fewer steps.

The garden had shorter plants than the yard had in it because the 
OPTIONS:
- garden was fertilized.
- yard was fertilized.

yard was fertilized.