Which two statements taken together imply that lim f(x) = 3? x-5 A. lim f(x) x-5+ = 3 B. lim f(x) and lim f(x) exist x-5- x+5+ C. For every sequence en 5 with an > 5 for every n, one has lim f(x) = 3. n D. lim f(5+) = lim f(5+) = 3. n n