A is wrong because it has a period after, <em>down</em> when it should be a comma. The comma signals that that part of the sentence is what he is saying. He is also capitalized when it should be lower case. B is wrong because it has nothing after, <em>down</em> and nothing after <em>said</em>. C is wrong because again, there's nothing after <em>down.</em> The part option C did get right is the comma after said. D has all the commas in the right places and all the words are capitalized when they're supposed to.
