Which of the following expressions is correct when a customer comes to the company？

A.I 'll contant our boss，please wait a moment.

B.If the boss is not available，politely make an appointment for anither time.

C.Welcome to our company.

D.I 'll show you to the reception room first.

正确答案：I 'll contant our boss，please wait a moment.If the boss is not available，politely make an appointment for anither time.Welcome to our company.I 'll show you to the reception room first.