B is correct. Temptation is a powerful thing, and they fell into it's trap.
The plot is simply the guideline for writing a paper. It outlines the story/topic.
the anwser is a. tells what someone or something is doing
A complex sentence has one dependent clause and one independent clause.
Here's some examples;
1. After twenty years, he still had feelings for her.
2. Because my coffee was too cold, I heated it in the microwave.