Which expression is equivalent to the given expression? 3 ⁢ x 2 + 5 ⁢ x − 7 ⁢ ( x 2 + 4 ) A. - 4 ⁢ x 2 + 5 ⁢ x − 4 B. x 2 + 4 C. x 2 + 28 D. - 4 ⁢ x 2 + 5 ⁢ x − 28