Answer:
D. I want to go to the symphony, but I don’t have any money.
Explanation:
D. I want to go to the symphony, but I don’t have any money.
The answer to your question would be that the option that correctly shows where a comma is needed in the sentence is the following one: I want to go to the symphony, but I don't have any money. That is, the correct option would be D.
You shold use a comma before any coordinating conjunction that links two independent clauses.
1) I want to go to the symphony (clause I)
2), but I don't have any money (clause II)
