Where did the dominoes originate before spreading throughout the spanish speaking world

The dominoes are believed to have been originated in China during the 12th century before it was spread throughout the Spanish-speaking world. The word domino is thought to have been originate from the original appearance of the dice, black dots on white background. the black dots on the a white background reminds of the domino worn by Christian priests.This game is usually played by two or even more persons that each has twenty-eight pieces of oblong ivory, plain at the back. When it is played by, the agreed highest score is twelve. A very important tip in playing this game is to eliminate first the heavy pieces like double six, four and five. 

The question is who are the cousins of carlos and lisa

Right answer: a. comprarías

this question is given using the conditional form. conditional tenses are is used when talking about hypothetical situations and probabilities. also, this is used when making polite requests. so comprarías is the conjugation of the verb comprar that matches the second person singular in the conditional. finally:

¿cuál comprarías tú?