Which of the Following Explanations Is Most Plausible

Which of the following explanations is most plausible?

A) The water in the pool is burning people's eyes because it has too much chlorine.
B) The cow died because it choked to death on a large lizard it was eating.
C) This diet drink tastes sweet because the company is lying about it not containing sugar.
D) The ancient Egyptians were able to build the pyramids because they knew how to levitate stone.
E) The ostrich has never been observed flying because ostriches are afraid to fly in front of humans.