Which expression is a prime polynomial? A. x 3 − 27 ⁢ y 6 B. x 4 + 20 ⁢ x 2 − 100 C. 10 ⁢ x 4 − 5 ⁢ x 3 + 70 ⁢ x 2 + 3 ⁢ x D.