3. Concerning cystic teratoma, which of the following is (are) true?

A) The risk for malignant transformation is approximately 2 to 5.
B) A mixture of matted hair and sebum produces a highly echogenic focus, with ill-defined acoustic shadowing.
C) An echogenic dermoid may appear similar to the bowel.
D) The "tip of the iceberg" sign refers to acoustic shadowing from teeth.
E) It is associated with a higher risk for cervical cancer.