Define the set A = {x | x is a composite number from 10 through 20}.

a. A = {10, 12, 14, 16, 18, 20}
b. A = {11, 13, 15, 17, 19}
c. A = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}
d. A = {10, 20}