plz help!!!!
will fan an give metal
The steady progress of industry in the United States was possible because:

A.new sources of energy allowed industry to develop
B.people developed methods to increase production
C.methods of transportation and communication were improved
D.all of the above

Question

plz help!!!!
will fan an give metal 
The steady progress of industry in the United States was possible because:

A.new sources of energy allowed industry to develop
B.people developed methods to increase production
C.methods of transportation and communication were improved
D.all of the above

euroramos12 · Answer

Im pretty sure D. all of above

helpdapanda · Answer

The answer you are looking for is D.    :D