Question

one major goal of the mercury program was to send a manned spacecraft into orbit and to bring it home safely. land it on the moon. go on extended flights. find a way to dock in space.

Explanation:

The Mercury program aimed to send a manned spacecraft into orbit and bring the astronaut home safely. Landing on the moon was part of the Apollo program, extended - flights and space - docking were later achievements.

Answer:

bring it home safely.