"What we can confirm is that talks are going on", Konstantin Kreidenko, a spokesman for the Russian Aviation and Space Agency, told Reuters on Tuesday. In order to be punctuated correctly, how must the sentence above be rewritten? A. "What we can confirm is that talks are going on," Konstantin Kreidenko, a spokesman for the Russian Aviation and Space Agency, told Reuters on Tuesday. B. "What we can confirm is that talks are going on", Konstantin Kreidenko a spokesman for the Russian Aviation and Space Agency, told Reuters on Tuesday. C. "What we can confirm is that talks are going on" Konstantin Kreidenko, a spokesman for the Russian Aviation and Space Agency, told Reuters on Tuesday. D. This sentence is punctuated correctly and does not need to be rewritten.