What does the following CSS do$?$

div $\{$ padding: $10$px $20$px; $\}$

a$.$

Adds $20$px padding only to the right side

b$.$

Adds $10$px padding to the top and bottom, $20$px padding to the left and right

c$.$

Adds $20$px padding on all sides

d$.$

Adds $10$px padding on all sides

e$.$

Adds $10$px padding to the left and right, $20$px padding to the top and bottom