Determine whether the following function is continuous at a. Use the continuity checklist to justify your answer. 5 x2 + 18x+ 9 f ( x ) =- -, a =8 x 2 - 8x Select all that apply. A. The function is continuous at a = 8. B. The function is not continuous at a = 8 because f(8) is undefined. C. The function is not continuous at a = 8 because lim f(x) does not exist. X - 8 D. The function is not continuous at a = 8 because lim f(x) #f(8).