Answer:
C. By placing Sputnik into orbit, the Soviet Union started up the Space Race competition with the United States.
Explanation:
On Friday, October 4, 1957 a momentous event had occurred in the region of the Soviet Union known as Kazakhstan -- the Soviets had launched an artificial satellite into orbit around the earth. Rather than celebrating this momentous scientific feat, Americans reacted by trying to send their own satellite into space. Thus, creating the space race against the USSR.
You didn't include the complex sentences so I don't know how to help you but a subordinate clause is a clause that can't become a stand alone sentence and can only be used with an independent clause.
By downplaying a situation in a way the reader doesn't expect - APEX
Social media orrrr all this entertainment stuff like movies etc
D because it would look good to have a hard copy of a resume for any job
