[Q]: How does the sentence end?

The squash that Erin grew in the yard are much bigger than Carrie's because 

[A]: Carrie is an inferior farmer.


[Q]: How does the sentence end?

Matthew was busy composing a play with Christopher as the main hero because 

[A]: Matthew owed him a favor.


[Q]: How does the sentence end?

Laura was helping Megan with serious digestive issues so 

[A]:
Megan ate an easily digestible meal.