Answer: I do not know if this is a multiple choice question or not, but I would contend that the blue flower is a reference to Neruda's country, Chile.
Explanation: The color blue is part of the flag of Chile. It symbolises, in part, the Pacific Ocean, and I believe that in these lines of his famous poem, the Chilean poet Pablo Neruda was referring to his beloved country, which he had had to abandon due to his political views. He is telling his lover that he wants her laughter like the flower he was waiting for, "the blue flower, the rose of my echoing country." He cannot have his country, but his lover's laughter will bring him the comfort that he needs in these difficult days away from his homeland.
the answer is Ayer yo supe la verdad.
supe
Not washing your hands thoroughly. Also being around someone with the flu, touching something with the flu virus on it then touching your eyes, nose or mouth (mucas membrane areas) wouls cause you to get flu
C., because netiquette is the correct or acceptable way of communicating on the Internet, and the only process of communication in any answer is C, which is language.
Hope I helped!