C. Only one pair of sides is parallel.
The picture shows you the reason why big chungus is so big.
The Area is 68 square centimeters
10,16,22,28,34,40,46,52,58
The factors of 44 are: 1, 2, 4, 11, 22, 44
The factors of 50 are: 1, 2, 5, 10, 25, 50
Then the greatest common factor is 2.