Question

Los pasteles son muy _____ para la salud.
A. mala
B. malos
C. malas
D. malo

Answer 1

For the first one, the answer must coordinate with the subject since the word will be an adj. 'Los pasteles' is masculine and plural meaning the adj must end in -os. The one that fits would be 'malos' so it is B.

Answer 2

Los pasteles son muy malos para la salud
The answer is B.malos