I NEED HELP PLEASE ILL MARK BRAINLIEST Which of the following happened first: A) A U. S.-manned space flight by Alan Shepard B) A Soviet-manned space flight with Yuri Gagarin aboard C) Three orbits of the earth by U. S. astronaut John Glen D) A lunar landing by a team of American astronauts​

The tower commission, appointed by president reagan in 1987 to investigate how the iran-contra affair had happened, concluded that most of the blame lay with a. president reagan himself, for careless management of his subordinates b. congress, for poorly drawn legislation that failed to define carefully the role of the president's national security council c. the american people, for failing to pay attention to the conduct of international affairs d. the federal courts, for having allowed excessive power to flow to the executive branch