What was the purpose of the American satellite,
Explorer I?

The first American satellite

Explanation:

Explorer I was the first American satellite to go to space. It was launched in 1958 from Cape Canaveral, Florida. Explorer I was the response to the Sputnik I launched by the Soviet Union. The purpose of the Explorer I was to carry scientific instruments like a cosmic ray detector in space.

the correct answer is “opportunity cost”. opportunity cost is what a company misses out because it decided in one option over another one. in this case, the company decided to invest in building a factory so it gave up another possible benefit or profit in order to achieve success with the factory.  

trade-off is not the correct answer since it is a situation in which you accept losing something in return for benefits in other areas.

and finally, consequence is a general term used to accept what it comes when you make a decision. it can be a positive or negative consequence depending if the decision you took was the correct one.  

d. she conquered the black sea coast and parts of poland.