Why,after Many Centuries of Accepting Biblical Stories,did Scholars Question the One

Why,after many centuries of accepting biblical stories,did scholars question the one about Noah's ark?​

A) ​No inland body of water would hold such a vessel.
B) Because the attitude of positivism allowed for no supernatural explanations.
C) ​The giraffe's neck had become too long after generations of having to reach for higher and higher branches to find food.
D) Galton's work in statistics showed that it was mathematically impossible.
E) There were too many identified species to fit two of each into a boat.