How did french artist jean-françois millet give realist and naturalist characteristics to the gleaners?

a millet took the figures from mythological sources but rendered them with lifelike detail.
b millet used real people for the figures, but painted them with colors from his imagination.
c millet painted the figures as they really appeared by using solid shapes and earthy colors.
d millet realistically modeled the figures after his friends who posed for him in his studio.