Mark the letter A, B, C, or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 18 to 23. (18) _____, we can significantly contribute to protecting the environment. If we become more conscious of our consumption habits, not only will we reduce waste, (19) _____. The more we recycle, (20) _____. Choose biodegradable products whenever possible, as they break down more easily and are (21) _____. Furthermore, if we choose to walk, bike, or use public transportation more often, we'll emit fewer harmful gases into the atmosphere. Last but not least, we can participate in community cleanups, (22) _____ and raise awareness about the importance of waste reduction. Remember, even small changes can make a big difference (23) ____