Which answer choice is equivalent to he sum of the polynomials below? (10*+-6)+(2x^2-9x-12) A. 3(4x-^2+6) B. 6(x-3) C. 6(2x^2-x-3) D. 18(x^3-1)​

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.