One patient was diagnosed with an osteoma.and the following statement is correct

A、No other associated symptoms
B、could not occur in the soft tissue
C、good hair and maxilla
D、 and X now have increased dense bone density
E、All are single hair一患者被診斷為骨瘤， 下列說法正確的是A--無其他伴發症狀B--不可能發生在軟組織C--好發與上頜骨D--X現為密質骨密度增高E--全部為單發