Answer:
Option B, Satellite
Step-by-step explanation:
The first achievement in the space war was made in year 1957 when USSR launched the first space satellite named Sputnik 1. After a year to this landmark event, USA also launched its first human spaceflight program known as project mercury in 1958.
The first space shuttle was launched in year 1981 by NASA and the first space station named Salyut was launched in 1971 by the Soviet Union. The first rover named the pathfinder was launched by USA on its mars expedition in year 1996
Hence, option B is correct