Which of the Following Is True with Regard to the Effects

Which of the following is true with regard to the effects of water on the cardiopulmonary system?

A) There is better lung expansion in water than on land, resulting in decreased respiratory rate.
B) Immersion in water has no measurable effect on blood pressure.
C) Perceived exertion is a better measure of patient effort than heart rate when exercising in water.
D) Most patients tolerate the cardiopulmonary system changes best when they enter and exit the water as quickly as possible.