utilizing what you know about ap style and correct grammar choose correct sentence below ans

Utilizing what you know about AP style and correct grammar, choose the correct sentence below. Answer The U.S. recently agreed to work with N.A.T.O. to help the Libyan rebels as they try to unseat long-time dictator Muammar Gaddafi. The United States recently agreed to work with NATO to help the Libyan rebels as they try to unseat long-time dictator Muammar Gaddafi. The U.S. recently agreed to work with N.A.T.O. to help the Libyan Rebels as they try to unseat long-time dictator Muammar Gaddafi. The United States recently agreed to work with NATO to help the Libyan Rebels as they try to unseat long-time dictator Muammar Gaddafi.