Choose the correct statement: (a) If lime-u |f(x)| = |4), then lime-+u f(x) = e (b) If lime-+u f(x) exists, then limr-yu f(x) exists (c) If lime->u(f(x) + g(x)) exists, then both limr-+u f(x) and limr-+u g(x) exist. (d) If limryu ga) exists, then at least one of limr-u f(x) or limrug(@) must exist. (e) none of the above is true