@charlenehansen I think its because A is too broad with "animals" whereas the prompt specified "these animals" in relation to reptiles, which D specifies. A could be correct if the wording/implication of D was changed.

@Kevin_Lin With the pay raise example, you say "In order to get a raise one of the things you must do is hit your target sales numbers, [...]." I was definitely tired/overthinking it but hearing "one of the things" in relation to the necessary condition made me think it was just sufficient.

@timwes21 Same it was his examples in "Only If" for some reason