The correct answer is A. “Do not depend on her greedy selfish friends.”
The preposition “on” is used to indicate reliance or support. In this case, the speaker is warning the listener not to rely on her greedy selfish friends.
The preposition “upon” is also used to indicate reliance or support, but it is more formal than “on.” In this case, the speaker could use “upon” if they wanted to emphasize the importance of not relying on her greedy selfish friends.
The preposition “to” is used to indicate a goal or destination. In this case, the speaker could use “to” if they wanted to say that the listener should not go to her greedy selfish friends for help.
The preposition “of” is used to indicate possession or origin. In this case, the speaker could use “of” if they wanted to say that the listener should not be a part of her greedy selfish friends’ group.
I hope this explanation is helpful!