The main reason why revolution swept so many African nations following their independence from European rule was because there was a giant power vacuum that needed to be filled--usually by a dictator.
AC is a type of current flow in a circuit. Electric charge in alternating current (AC), changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction. It transmits electricity over long distances. AC can come in a number of forms, as long as the voltage and current are alternating.
Jimmy Carter is known to be an American politician as well as the 39th President of the United States. During his presidential campaign, he asked the Americans to cast their votes for him for the reason that he could restore that faith of the Americans in their government after the incident of Watergate scandal. The answer is option D.