Answer:
(A) NASA was established. - This statement is true. NASA (National Aeronautics and Space Administration) was established in 1958, during the Space Race.
(B) Yuri Gagarin orbited Earth. - This statement is also true. Yuri Gagarin became the first human to orbit the Earth in 1961, during the Space Race.
(C) The Soviet Union launched Salyut. - This statement is true, but it refers to a later period in the history of space exploration. Salyut was a series of Soviet space stations that were launched in the 1970s and 1980s.
(D) The United States launched Skylab. - This statement is true. Skylab was a space station launched by the United States in 1973, during the Space Race.
(E) The United States launched Explorer 1. - This statement is also true, but it predates the Space Race. Explorer 1 was the first American satellite to be successfully launched into orbit, and it was launched in 1958, shortly after the establishment of NASA.