_____ every member has arrived, let's get down to _____ the plan for the next five years. [ ]

A. Now that; work out

B. Because; work out

C. Since; working out

D. For; working out

在下列哪些情况下，双方当事人签有仲裁协议或仲裁条款，但人民法院依法有权受理一方当事人的起诉()

A．当事人在仲裁条款或协议中选择的仲裁机构不存在

B．涉外经济合同当事人达成的仲裁条款或协议约定由域外的仲裁机构仲裁

C．仲裁条款或协议的内容不明确

D．仲裁条款或协议选择裁决的事项超越仲裁权限