Which of the Following Is Not One of the Reasons

Multiple Choice

Which of the following is not one of the reasons that closed circulatory systems are more efficient than open circulatory systems?

A) Closed systems rely exclusively on simple diffusion for transport, whereas open systems rely on pumping mechanisms.
B) Transport within closed systems is more rapid than in open systems.
C) Blood can easily be directed to specific areas in closed systems, but not in open systems.
D) Compared to open systems, closed systems operate better under higher pressure.
E) In closed systems molecules and cells that transport hormones and nutrients can be kept in vessels until they unload their goods at specific tissues.