Have I chosen the right words?

The space age 33 commenced in October 1957 with the launch of the spacecraft Sputnik.
33. 1) set out 2) initiated 3) set off 4) commenced

Both spacecraft were totally 34 destroyed when re-entering the Earth’s atmosphere.
34. 1) broken down 2) destroyed 3) demolished 4) damaged

These results provided scientists with important medical data which 36 expanded their knowledge regarding the effects of the outer space on living beings.
36. 1) expanded 2) enlarged 3) multiplied 4) build up

Question

Have I chosen the right words?

The space age 33 commenced in October 1957 with the launch of the spacecraft Sputnik. 
33. 1) set out 2) initiated 3) set off 4) commenced

Both spacecraft were totally 34 destroyed when re-entering the Earth’s atmosphere.
34. 1) broken down 2) destroyed 3) demolished 4) damaged

These results provided scientists with important medical data which 36 expanded their knowledge regarding the effects of the outer space on living beings. 
36. 1) expanded 2) enlarged 3) multiplied 4) build up

Answer

I think you are correct on all three! :)