I will mark the brainliest! Please explain why the correct answer is correct and why the other answers are wrong. Thank you!
12. Which of the following statements is true?
(A) If limx→c f(x) = L, then f(c) = L
(B) limx→π sin x/x = 1
(C) If f and g are functions, then (f(g(x)) = g(f(x)) for all values of x.
(D) For polynomial functions, the limits at all x-values from the right and the left must exist and must be equal.