John replaced all the halogen bulbs with LED bulbs because the 
OPTIONS:
- halogen bulbs consume less energy.
- LED bulbs consume less energy.
LED bulbs consume less energy.

The cake was a more popular item on the menu than the shake, because the 
OPTIONS:
- cake was delectable.
- shake was delectable.
cake was delectable.

Brian rested on the large bed as Kevin studied because 
OPTIONS:
- Brian was very behind in school.
- Kevin was very behind in school.
Kevin was very behind in school.