Problem: How does the sentence end?

Donald's car started, but Nelson's car did not, because
Answer: Donald put his spark plugs in correctly.

Problem: How does the sentence end?

Adam asked Ryan to walk their dog and wash the dirty dishes because
Answer: Ryan had the day off.

Problem: How does the sentence end?

Natalie stayed away from Samantha when she was upset, as
Answer: Natalie avoided problems when she could.

Problem: How does the sentence end?

Lawrence was more grateful for their gift than Benjamin was for theirs because
Answer:
Lawrence had gotten much more.