Answer: This passage contains a B) cause-and-effect relationship.
Explanation: A cause-and-effect relationship consists in two or events that are connected to each other because one is a result from the other/s. In other words, one of the events determines why something happened, and the other event refers to the consequence of that event. In this passage from The American Plague, the fact that Knox lost his warrior instinct is the cause, while having closed up his house and travelling from New Jersey to Manhattan Island is the effect.