Betty has a checking account and a non-interest-bearing savings account. Function Crepresents her checking account balance, where x is the number of months. Function S represents her saving account balance. C()=-1240x140 + 1,400 S(x) = 450x + 100 Which function represents Betty's total account balance, T(x)? A. T(x) = -1240r140] + 450x + 1,500 B. T()=-1240x140] + 450x + 1,400 OC. T(x) = |240x + 140|+ 450x + 1,500 OD. T(x) = -1240x - 140| 450x+1,300