Read, look at the image, and choose the correct option. A. El libro es interesante.
B. El cuaderno es verde.
C. La computadora es azul.
D. La maestra es baja.

Since we see more than one kid trying to read the book

we can said it's A. El libro es interesante.

since if you see the option b it's the notebook is green (that is not a notebook less it's green)

c is the computer is blue ( we don't see a blue computer on there)

and d the teacher is small (on the photo the teacher it's not on there, so we can't said if she/him is small or tall)