Answer: The correct answer is B : The reception
Explanation: I have provided the translation to the text given and you can see how the answer is obvious.
Original Text :
Hola mis padrinos chistosos iban a Cuba a veces para las bodas de algunos miembros de su familia, el suegro y la suegra del novio pagaban por la boda y la recepción.Durante la recepción, mis padrinos veían a los invitados bailar y comer. La recepción no siempre era cara.
Translation :
Hello, my funny groomsmen went to Cuba sometimes for the weddings of some members of their family, the groom's father-in-law and mother-in-law paid for the wedding and the reception. During the reception, my godparents watched the guests dance and eat. "The reception was not always expensive."
We can conclude that the reception was inexpensive from this line. Hope this helps :)