Put the sequences on this chart in the correct order.
A 2 column table with 3 rows. Column 1 has entries Step 1, Step 2, Step 3. Column 2 has entries Orbital velocity found, 17,500 m p h; Escape velocity was found, 7 miles per second; Scientist had to figure out how to leave Earth's gravity.
a.
2,1,3
c.
1,3,2
b.
3,2,1
d.
1,2,3