Answer: i dont know it but i THINK a
Edit; i looked it over again and i was wrong it is C soo sooo soooooooooo sorry about that!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer :El biblioteca, Los libros, La Idioma, La mochila, El chico, Los lápices
Explanation:
El, La are singular and feminine, while Los, Las are plural and masculine.