Answer:
A.to launch moon missions
Explanation:
The Apollo project's main aim was the landing of humans in the moon.
It was set in the context of the arms race and the space conquest between the USSR and the US. The Soviet Union had the lead as it was the first to launch an artificial satellite (The Sputnik) and set Yuri Gagarin as the first cosmonaut that was able to orbit in space around Earth.
The Americans to their part promoted the Apollo initiatives and initially conceived a three-man spaceship that would depart to the moon and come back safely. It saw Neil Amstrong as the first man landing on the Moon.
As this happened the US resulted victorious in establishing a flag in the moon, as a sign that they wanted to reafirm the victory in the race for the space conquest.
