Using the intermediate value theorem, determine, if possible, whether the function f has at least one real zero between a and b. 3 2 f(x)=x+3x-8x-7; a=-8, b = -1 Select the correct choice below and, if necessary, fill in the answer boxes to complete your choice. ○ A. By the intermediate value theorem, the function does not have at least one real zero between a and b because f(a) and f(b) = . (Simplify your answers.) ○ B. By the intermediate value theorem, the function has at least one real zero between a and b because f(a) = ☐ and f(b) = | (Simplify your answers.) OC. It is impossible to use the intermediate value theorem in this case.