19. Look at the following points. (1) To describe an action that is going on at this moment. (2) To describe an action that is going on during this period of time or a trend. (3) To describe an action or event in the future, which has already been planned or prepared. (4) To describe something in the past when we don't know when it happened or when it happened is not important. (5) Started in the past, continues until now, and may or may not continue into the future. Above are the functions of present continuous tense shown by number .... A. (1), (2), and (3) B. (1), (3), and (5) C. (3), (4), and (5) D. (1), (2), and (5)