Which of the Following Is an Advantage of Closed Circulatory

Multiple Choice

Which of the following is an advantage of closed circulatory systems as compared to open circulatory systems?

A) Transport occurs more rapidly.
B) Closed systems can direct blood to specific tissues.
C) In closed systems, cells and large molecules can be kept separate from the animal's intercellular material.
D) Closed systems can support higher levels of metabolic activity.
E) All of the above