A．give advice B．make an offer C．ask for permission D．request som

Man: Hello, Mr. Black, this is Thomas. I hear your company wants to open up a new market in North America. You know, before you carry out your plan, you need have a profound knowledge of the market there.  You can entrust the market research and analysis to us. We have been in this field for ten years. Now we have a worldwide network and excellent staff for doing the job.  I assure you the service we provide is of first class.