Circulatory is the answer you're looking for.
d. Empiricism
As empiricism is basically an experience derived from senses. So here through the text we can see that empiricism is very evident.
It was solved by listening slowly. hahahahahahaahaha
Thomas Hunt Morgan found a white eyed mutant male drosophila among the normal red eyed kind. As it is found in the male.
So according to above explanation
<span>B.White eyes are lethal in male Drosophila, is the correct answer.</span>
I don't understand this question at all can you make it clear?