Which of the following is the best explanation for why vegetable oil is a liquid at room temperature while animal fats are solid?

A)Vegetable oil has more double bonds than animal fats.
B)Vegetable oil has fewer double bonds than animal fats.
C)Animal fats have no amphipathic character.
D)Vegetable oil has longer fatty-acid tails than animal fats have.
E)Vegetable oil has shorter fatty-acid tails than animal fats have.