Our city water supply is running seriously low. Months without rain along with extremely high temperatures have caused us to use up our water supply. Everybody can help in this difficult time. Don't wash cars, water lawns, or fill up swimming pools until our water levels are back up. It is easy to do the right thing, feel good about it, and save water! Our planet Earth will be thankful. What is the purpose of this announcement? A. to inform the reader about our planet B. to entertain the reader with a joke C. to persuade the reader to save water D. to influence the reader to go swimming