The function f has the property that as x gets sufficiently close to 4, but not equal to 4, the values of f(x) get closer and closer to –1. Which of the following statements must be true? A) f(4) = –1

B) f(–1) = 4

C) lim (x-->4) f(x) = -1

D) lim (x-->-1) f(x) = 4

E) ) f(x) is continuous at x = 4