Correct Option: D

The Apollo missions were a series of space missions, both manned and unmanned, flown by NASA between 1961 and 1975. They culminated with a series of manned Moon landings between 1969 and 1972. The first manned flight of Apollo was in 1968 and it succeeded in landing the first humans on Earth’s Moon in 1969 through 1972. It was during the Apollo 11 mission that astronauts Neil Armstrong and Buzz Aldrin landed their Lunar Module (LM) on the Moon on July 20, 1969 and walked on its surface while Michael Collins remained in lunar orbit in the command spacecraft, and all three landed safely on Earth on July 24.