Whichofthefollowingstatementisnottrueaboutcarcinomaofprostate？（）

A. It’s a disease of men above the age of 50.
B. Heredity. environmental factors, and acquired somatic mutations have roles in the pathogenesis of prostate cancer.
C. Most are small. nonpalpable, asymptomatic, and they’re usually discovered on needle biopsy.
D. Benign prostatic hyperplasia easily develops into carcino