A) This statement is incorrect. Increasing the dialysis session duration would not address the client's muscle cramps and may lead to further fluid and electrolyte imbalances.

B) This statement is accurate. Muscle cramps during hemodialysis are often caused by the cooling effect of the dialysate solution. Increasing the temperature of the dialysate can help alleviate the cramps.

C) This statement is incorrect. Decreasing the dialysate solution flow rate may not directly address the muscle cramps and may impact the effectiveness of the dialysis treatment.

D) This statement is incorrect. Administering an anticoagulant medication is not indicated for muscle cramps during hemodialysis. Anticoagulants are used to prevent blood clots during the procedure but would not alleviate muscle cramps.