Who Among the Following Individuals Is Most Likely Straight

Who among the following individuals is most likely straight?

A) Elijah, a man in his thirties who has been dating Sam, a young man, for two years
B) Arnold, a young man who enjoys sexual intimacy with both men and women
C) Edward, a man who is sexually attracted to his older male colleague Jose
D) Chloe, a woman in her twenties who is sexually attracted only to younger men