What do these notes indicate about the relationship between the ussr and the united states?

a. the united states was busy building up nuclear arms to attack the ussr.
b. the ussr fell behind in the space race as the united states launched a satellite.
c. the united states was competing to keep up with the ussr in the space race.
d. the ussr was focusing primarily on the arms race with the united states.

the answer is
c.