— I'm sorry, I shouldn't have been so rude to you.  

— You ______ your temper but that's OK. [ ]

A. have lost

B. had lost

C. did lose          

D. were losing

某甲与某乙系邻居，因借款问题发生纠纷。经过人民调解委员会调解后，某甲不服，认为人民调解委员会的调解不公，遂向人民法院起诉，请问本案中谁为被告()

A．人民调解委员会

B．某乙与人民调解委员会为共同被告

C．某乙

D．某甲可以任选某乙或人民调解委员会作为被告