I believe that the correct answer is Man VS Self because internal means something happening within a person or inside something. Internal conflict is like when a character has an angel on one side and a devil on the other. The angel is when the character wants to make a good decision and the devil is when the character wants to make a bad decision. So the answer is not man vs society, because internal conflict means something happening within a person, and if it was man vs society, then that would be external conflict (a struggle between a character and an outside force).
So the correct answer is Man VS Self, not Man VS Society. I hope this helped you understand, and good luck with your future assignments :)