The child of Natalie was better at math than the child of Rebecca, as a result of 
OPTIONS:
- Natalie being a house maid.
- Rebecca being a house maid.
Rebecca being a house maid.

Laura always had more motivation in life and achieving goals than Katrina, as 
OPTIONS:
- Laura was optimistic.
- Katrina was optimistic.
Laura was optimistic.

Bill's new science text book would not fit in his old backpack, the 
OPTIONS:
- backpack was too narrow.
- book was too narrow.
backpack was too narrow.