Adriana,
This is a causal argument. It is the use (including increased use) of money that is asserted as the cause, not the advent of money.
Use of Money
Civilization Declines (this being causal, not conditional)
There are multiple ways of weakening a cause effect argument, in this case, it is weakened by showing a circumstance where the cause exists but the effect did not follow, answer choice (B).
"Intrinsic value" is a comically bad argument that has been raised by various people throughout history. Intrinsic means "belonging naturally, essential," but nothing has value except to the person who wants or needs it for one reason or another, and thus there is no such thing as "intrinsic value." Think water. Are you thirsty, or are you drowning?
You don't need to care about any of that to get the question right, because you can just focus on weakening the claim that using money causes civilization to decline. (A) is about people's preferences and tells us nothing about whether their preferences help or hurt civilization, so (A) is irrelevant and can be eliminated immediately. Don't get focused on an answer choice just because it recycles a word.