The correct answer is cause-and-effect.
As the name itself says, cause and effect relationships have to contain a cause and an effect. A cause for an action is what motivates a character to do a particular thing, and the effect is the result of such actions. Obviously, these kinds of relationships could move the plot forward and give rise to new relationships and events within a story.
Answer:
B. Trying too hard to save money can cost you.
Explanation:
The passage fails to say anything about them regretting not to do more research, but it does say a lot about saving money. Instead of buying the costly boat, Rachel and Arnel bought the cheap boat which ended up falling through. This mistake cost them as now they have lost money from this purchase and they have to buy another boat instead. As a result of trying to save money, they ended up losing more money.
