RFP dilemma: What should my colleague do?

You may have the answer to my colleague’s investment management RFP dilemma.

Here’s his question: “When preparing an RFP response (one in which you repeat the question, then provide the answer) should you correct the original author’s spelling or grammatical error?” 

Also, should you worry about offending the client if you correct an error?

What do YOU think? I’ll give my opinion after I hear from some of you.