— How much__________the shoes?

—Five dollars__________enough.

A．is; is

B．are; is

C．are; are

D．is; are

某甲和某乙因为房屋租赁合同发生纠纷，后起诉至法院，下列哪些诉讼行为是行使辩论权的体现( )

A．某甲请某丙作为证人参加法庭调查

B．某乙提交书面答辩状

C．某乙和某甲在法庭上层开激烈争论

D．某丙出庭为某甲作证