Mr M Has Been Diagnosed with Chronic Kidney Disease Stage

Mr. M has been diagnosed with chronic kidney disease Stage 5, requiring dialysis. His initial chemistry panel indicates he has low chloride, sodium, and calcium levels as well as high potassium and phosphorus levels. The physician has put him on a fluid restriction, a potassium restriction, and a phosphorus restriction.
-What is the reason that a physician might order a potassium restriction?

A) potassium interacting with kidney disease medications
B) high potassium levels stimulating the secretion of aldosterone by the adrenal glands
C) high potassium levels causing the retention of vasopressin
D) potassium directly interacting with calcium
E) diet containing very high levels of potassium