How does the poet inject his own cultural experience into the poem?
a. he describes his blood on the street.
b. he talks about the flower of his country
c. he laughs.
d. he struggles to envision the autumn mist.

If you are referring to Pablo Neruda's poem "Your Laughter," then I believe the correct answer is B. He talks about the flower of his country.
This is what he says in the poem:
I want your laughter like 
the flower I was waiting for, 
the blue flower, the rose 
of my echoing country.

As you can see here, he is connecting his home country and his culture to this flower, and ultimately to her laughter that he so desperately desires to see again.