You will be given a definition of a task first, then some input of the task.
In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".

[header] How to treat heat cramps [title] Identify when you have a heat cramp. [step] Heat cramps are painful muscle spasms that result from dehydration, typically due to exercising or working in hot environments. Heat cramps are not simply caused by heat or being in a hot environment, as the name might suggest. <sep> (A) [substeps] Heat cramps cause the area to start to itch and cause cramping during your activity. As with hot temperatures, for example, these symptoms indicate that you've high blood pressure or if you exercise regularly. (B) They can arise when hot conditions contact the moisture in sweat. [title] Recognize heat cramps are caused by hormonal imbalances. (C) Intense sweating from the exertion results in a loss of both fluid and the electrolytes (salt) needed for proper muscle function. Though you can experience heat cramps in any muscle group, they are most common in the calves, arms, abdominal muscles, and back muscles. (D) Because of this, you can ask your doctor if you have cramps before taking the medications you are taking. [title] Try probiotics or probiotics.
Output:
C