Right answer: maíz, pan y el arroz
An abarrotería is a Spanish word used in Central America for grocery store.
In a grocery store normally edible products are sold, and among these products are corn, bread and rice, which in spanish are maíz, pan y el arroz.
Therefore the complete sentence is:
Fueron a la abarrotería y compraron maíz, pan y el arroz
They went to the grocery store and bought corn, bread and rice
The options unos libros y unas novelas (some books and novels), una nevera y una televisión (a fridge and a television) and unos vaqueros y una chaqueta (some jeans and a jacket) are not edible products, hence are incorrect in this sentence.