Which statement is true about the factorization of 30x2 + 40xy + 51y2?

Which statement is true about the factorization of 30x2 + 40xy + 51y2?

a. The factorization of the polynomial is 10(3x2 + 4xy + 5y2).
b. The polynomial can be rewritten as the product of a trinomial and xy.
c. The greatest common factor of the polynomial is 51x2y2.
d. The polynomial is prime, and the greatest common factor of the terms is 1.