[Q]: How does the sentence end?

Since Robert experienced many more personal crises and difficulties than Joel, 

[A]: Robert had many problems with depression and anxiety.


[Q]: How does the sentence end?

The dog ran uphill to chase the cat, but the cat was able to escape because the 

[A]: cat was too fast.


[Q]: How does the sentence end?

The belly button of Christopher has lint in it, while Matthew's has none, so 

[A]:
Christopher is the filthier person.