I think the options are those:
A) to sell surplus goods and procure raw materials
- this is definitely a good reason to look beyond boundaries
Bto provide jobs for its surplus of industrial workers
- well, this did not happen too oftern, but it is also a valid reason
Cto spread Christianity to those it considered inferior
- not an official policy, but i can imagine this
Dto civilize the “inferior races” in Asia and Africa
- same as C.
Eto establish military alliances with other nations
- I think that this is the correct answer. In the 19th Century, the US had a poplicy of non-alignment and non-interventionism, so it avoided military alliances.
