Actions speak louder than words means talking about something isn't going to make it better, you should take action so it helps solve the problem. I wouldn't say it talks about proving anything wrong based on the definition.
Answer:
She did not cheat on the test, for it was the wrong thing to do.
I really need to go to work, but I am too sick to drive.
I am counting my calories, yet I really want dessert.
He ran out of money, so he had to stop playing poker.
I want to lose weight, yet I eat chocolate daily.
Explanation:
The poem tells how a dream is a dream when the author says eat me
The only conjunction in this sentence is C) but.
All of the other options are prepositions, not conjunctions.