引起病毒性心肌炎

A．金黄色葡萄球菌
B．痢疾杆菌
C．草绿色链球菌
D．Coxsachie(柯萨奇)病毒
E．产气杆菌

The boy _____ I talked with just now is my best friend. [ ]

A. who

B. which

C. where