前列腺触诊发现前列腺肿大质硬，表面有结节，应考虑为（）

A.良性前列腺肥大

B.急性前列腺炎

C.前列腺结核

D.前列腺癌

E.前列腺增生

I don't understand this question. Would you please             [     ]

A. explain me it      

B. explain it to me  

C. explain it for me  

D. explain it me