Question

scientists live and work in space on board the international space station. there are many scientists working there. for a long time, people traveled to the iss on the space shuttles. in february 2003. that was when there was an accident with the columbia space shuttle. the iss relied on vehicles from the ground while it looked into what happened. until 2008. russia and the united states are
do it!
russia and the united states are
a importing
b apologizing
c cooperating
d panicking

Explanation:

The International Space Station is a joint - project involving multiple countries including Russia and the US. They work together in space - related activities, which implies cooperation.

Answer:

C. cooperating