9. Choose the best supporting sentence from the following paragraph: "Smart phones are the most modern invention nowadays. They have changed the way how people communicate. In the past, people wrote letters. It took a long time to get information from your friends. But for now,many kinds of communication apps are available for users to download from their smart phones.____________The distance between people is getting closer because of the prevalence of smart phones.(A) I can use my smart phone to go online and chat with my friends at any time.(B) People will like to use smart phones because of its convenience.(C) Smart phones are sure to replace cell phones in the near future.(D) Anyone will be able to receive information within a short time.