Answer:
The answer is C because it talks about paying the board and saving and being responsible with your money
Answer:
The video in the cell phone makes me sad.
Because they didn't need hin to go
It is a simple sentence.
A simple sentence contains one independent clause - which is the case with sentence 7. There is one subject (they) and one verb (rule), which means that it is a simple sentence (because of one verb only). A dependent clause wouldn't be able to stand on its own, and sentence 7 obviously can, which is why it is not dependent.