Which of the Following Describe Types of Tumor-Associated Antigens? (Select

Which of the following describe types of tumor-associated antigens? (Select all that apply.)

A) They are derived from self proteins to which the immune system is not tolerant.
B) They are derived from proteins encoded by mRNAs that have undergone abnormal post-transcriptional splicing.
C) They are proteins normally expressed in immunologically privileged sites.
D) They are proteins expressed at unusually high levels.
E) They are derived from viral proteins to which the immune system is not tolerant.