In the Normal Path of Urine from the Kidney to the Bladder

Multiple Choice

In the normal path of urine from the kidney to the bladder and out of the body,which structure,if blocked,would prevent urine from reaching any of the other structures?

A) collecting duct
B) renal pelvis
C) ureter
D) urethra
E) urethra $\rarr$ collecting duct $\rarr$ renal pelvis $\rarr$ ureter $\rarr$ urinary bladder