Which of the following is true of the effects of sleep deprivation?

A) It is cumulative in nature.
B) It is possible for the body to develop tolerance to reduced sleep in a short span of time.
C) It is much more pronounced in men than women.
D) It reduces stress levels.

Sleep deprivation has a cumulative effect, which means that the longer you go without sufficient rest, the worse the effects become. This can lead to a wide range of negative impacts on mental and physical health, including impaired cognitive function, mood changes, increased stress levels, and weakened immune system.