Mr. Thompson's blood and urine tests are negative for glucose and ketones. However, Mr . Thompson is losing large amounts of water in urine, and the volume lost is being replaced (via IV) .
Given this new information, Mr . Thompson's excessive fluid loss in his urine most likely indicates:
a. an increased blood level of aldosterone
b. a decreased blood level of antidiuretic hormone
c. an increased blood level of antidiuretic hormone
d. a decreased blood level of insulin