Using the intermediate value theorem, determine, if possible, whether the function f has at least one real zero between a and b. 3 f(x)=x+2x²-9x-8; a= -7, 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 has 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 does not have at least one real zero between a and b because f(a) = and f(b) = (Simplify your answers.) ○ C. It is impossible to use the intermediate value theorem in this case.