Preliminary tests identified the source of the outbreak as the highly contagious norovirus, which had struck several guests just before they boarded the cruise Nov. 3 in Rome, Carnival officials said.

Choose your answer: based on the paragraph above can we conclude that "Guests boarded the cruise on Nov. 4 in Rome. "?

Options are: (i). Yes. (ii). It's impossible to say. (iii). No.
I think the answer is
(iii).