Apollo 9 launched in 1969. Its mission was to test the
lunar model, the part of the space vehicle that would
take the astronauts to the moon. The astronauts in the
lunar module tested its engines and equipment while
they orbited Earth.
Which specific NASA goal did Apollo 9's mission focus
on?

A.(allowing astronauts to live and work on the moon)

B.(creating technology for moon flight)

C.(gaining knowledge about the moon)​

Help!!!!