Aphrodite cast a spell on her. This is shown when Helen later speaks on the matter saying she regrets leaving with Paris and her husband Menelaus says he forgives her because Aphrodite can do that to people.
I think that 'more genuine' would complete the sentence best.
C. How long does it take to travel from the Earth to the moon?
This is the weakest research question because it can be easily answered. According to a 2 second Google search, it takes about 3 days for a spacecraft to reach the moon from Earth. This question does not allow for a lot of research for development into an essay. Options A, B and D all have a variety of possibilities that would allow for a multi-paragraph essay with significant topic development.