PLEASE HELP!!!!!!!
Which expression is equivalent to 9x^5+3x(4x^4-3x^2)^2
A. 48x^9-24x^6+9x^5+9x^4
B. 48x^9=9x%-9x^4
C. 48x(-18x^5
D.48x^9-72x^7+36x^5