下列有关黑毛舌的描述错误的是（）

A.分为真性和假性两种，前者是一种发育异常，后者可能是由于微生物的作用所致

B.常发生于丝状 * * 最稠密的人字沟前方，表现为丝状 * * 增生和角化过度，局部色素增加

C.病程长短不一，经1～2周或数月后，患处逐渐脱屑，颜色变淡，愈后可能复发

D.该病皮损愈合后常留有凹陷性瘢痕或增生性瘢痕

E.抗生素的滥用可扰乱口腔内微生物菌群，导致引起该病的某些真菌或细菌繁殖、感染

W: I need to talk to someone who knows Baltimore well. I’m told you lived there.
M: Oh, but I was really young at the time.
Q: What does the man mean().

A. He moved to Baltimore when he was young.

B. He can provide little useful information.

C. He will show the woman around Baltimore.

D. He will ask someone else to help the woman.