1) For this essay, you have been told to maintain a formal tone. Which of these would NOT constitute an appropriate introductory sentence? A) Everyone agrees that the Concorde was a really cool airplane. B) The Concorde was an incredible plane which became an international sensation. C) The Concorde phenomenon is unprecedented in the history of airline technology. D The Concorde was a plane that could fly from Paris to New York in less than four hours. 2) Which two sentences would NOT be acceptable to include in this essay, which is meant to be composed in a formal tone?​