Give us more information about the question
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.
I feel like agree with (B) much more because in the question it states that the quote has to show the "cultural complexity" of the genre meaning that its not as static as it was before as mentioned in question A. , but how it evolved over-time thus becoming more complex : branching out into different ideas of race and class .