单项选择题

A.向Th细胞呈递外源性抗原肽
B.向Th细胞呈递内源性抗原肽
C.向Tc细胞呈递外源性抗原肽
D.向Tc细胞呈递内源性抗原肽
E.向γδ+Tc细胞呈递内源性抗原肽