[Q]: How does the sentence end?

Brett had to introduce Christopher to all the important things in the company, because

[A]: Brett is a senior developer.

[Q]: How does the sentence end?

The oak tree weathered the storm but the sapling perished. This is because the

[A]: sapling tree was much more fragile.

[Q]: How does the sentence end?

He started a company dealing with housing rather than agriculture because the

[A]:
agriculture was less lucrative.