[Q]: How does the sentence end?

Hunter was suicidal and Robert responded for the reason that

[A]: Robert had previously been in this critical situation.

[Q]: How does the sentence end?

Mary had to ask Carrie for help with their fish tank because

[A]: Carrie had a lot of experience with fish.

[Q]: How does the sentence end?

Lindsey gave the container of sugar to Megan because

[A]:
Megan had been following a recipe.