Which of the following choices is not an option to complete this sentence? the friend goes to the and buys a kilo of candies.
a. mercado
b. comedor
c. vendedor
d. entonces

First we should know what the words mean.
a. mercado means 'market'
b. comedor means 'cantine/restaurant'
c. vendedor means 'shop assistant'
d. entonces means 'then'

A person can either go to a market, restaurant or shop assistant and ask for candies. Therefore the only answer that isnt suitable is d.

Almost every country has citizens that speak spanish but there is no country i know of that every one speaks spanish hope this