A Water Vascular System May Be Advantageous in Echinoderms Because

A water vascular system may be advantageous in echinoderms because

A) it increases reproductive output.
B) it accomplishes the function of three separate systems (gas exchange, locomotion, and feeding) .
C) it allows an organism to rapidly move in the water.
D) it increases the amount of time an echinoderm can spend on land.
E) it serves as a filtering device for environmental toxins.