Well, since C is the only example where a positive thing happens, then it is certainly not a potential problem, so 'they can provide a lot of energy for people to use' is the correct answer. The other examples are problematic.
Answer:
Revenge and its consequences are a large part of the play. In his desire to revenge his father, Hamlet causes Ophelia to commit death, murder her father, is responsible for the poisoning of his mother, the death of his Uncle (the King), and ultimately, his own death as well. Hamlet's revenge has far reaching consequences
A the main idea of the essay
Romeo’s heartache will be healed by going to the party.
Romeo’s heartache will go away if he meets another girl.
Romeo’s heartache will lessen as he gets older.
Romeo’s heartache will be healed by a potion.
