[Q]: How does the sentence end?

Matthew dropped the carton of eggs while Dennis carried his eggs on his head, because 

[A]: Matthew was clumsy.


[Q]: How does the sentence end?

Eric had only just begun and Neil had been doing it for years, so 

[A]: Eric was a novice in comparison.


[Q]: How does the sentence end?

The classical concerto conductor saw that the violins weren't ready but the cellos were because the 

[A]:
cellos were in tune.