Put the sequences on this chart in the correct order

Step 1
Orbital velocity found (17,500 mph)

Step 2
Escape velocity was found (7 miles per second)

Step 3
Scientis had to figure out how to leave Earth's
gravity

A. 2,1,3
B. 3,2,1
C. 1,3,2
D. 1,2,3

Please select the best answer from the choices provided