[Former astronaut Ken Bowersox] says Gateway encourages more-ambitious missions. “It’s like a base camp on a mountain. When you build that, people are tempted to go higher, and they do go higher.”
NASA is inviting its international partners to pitch in. Russia may provide the air-lock module. Japan might contribute an additional module that will assist with propulsion and communications. Canada could build a robotic arm that would allow Gateway to do outdoor work.
Which statement best expresses the central idea of this passage?

A. Ken Bowersox is going to ask an astronaut from Japan to join the program.
B. Many nations are interested in working together to go farther into space.
C. Robotic arms will be used to build a base camp on the moon.
D. Russia, Japan, and Canada are part of NASA.