Which phrase best completes the conversation?

fui y compré un libro viejo, una falda hecho a mano, y un par de aretes.
al supermercado
al almacén
a la feria artesanal
al mall

This is the correct answer because in this place you can find connected buildings that contains a variety of retail stores. So you can buy here an old book (un libro viejo), a handmade skirt (una falda hecha a mano) and a pair of earrings (un par de aretes). The other sites are supermarket (supermercado), almacén (warehouse) and craft fair (feria artesanal)

es is the right