Which of the Following Statements About Open Circulatory Systems Is

Which of the following statements about open circulatory systems is true?

A) Open circulatory systems have a higher peripheral resistance.
B) In open circulatory systems materials are transported from the circulating fluid to the interstitial fluid and then to the cells.
C) Open circulatory systems allow a higher metabolic rate but are energetically expensive.
D) In open circulatory systems, the circulating fluid is anatomically separated from the interstitial fluid.
E) Open circulatory systems return blood more slowly to the heart.