Choose the correct answer below. A. Yes. Linear functions always have ​(​,​) as their domain and​ range, so they are always increasing or decreasing. B. No. Linear functions can also be​ constant, which means neither increasing nor decreasing. C. No. Linear functions can be both increasing and decreasing. D. Yes. Linear functions always have an​ x- and​ y-intercept, so they are always increasing or decreasing