Question

the primary symptoms of bladder cancer is
urea in the blood
inability to empty the bladder
blood in the urine
pain with urination

Explanation:

Blood in the urine (hematuria) is the most common and primary symptom of bladder cancer. The other options are not the defining primary symptom: urea in the blood is related to kidney dysfunction, inability to empty the bladder is a symptom of conditions like an enlarged prostate or nerve issues, and pain with urination is more associated with infections or stones.

Answer:

C. blood in the urine