Add the polynomials 2 x cubed plus x squared minus 3 and 2 x squared plus 4 x minus 1. a.) 4 x cubed plus 5 x squared minus 2 b.) 2 x cubed plus 3 x squared plus 4 x minus 4 c.) 4 x cubed plus 5 x squared minus 4 d.) 2 x cubed plus 3 x squared plus x minus 1