President James Buchanan´s Inaction on Southern Secession Was Partly Out

President James Buchanan´s inaction on southern secession was partly out of practical concerns,including

A) fear of southern military prowess.
B) the prospect that European powers would become involved.
C) the fact that America´s small standing army was scattered in the West, fighting Indians.
D) worry over his chances in the upcoming election.
E) the reality that the navy was already stretched thin in the Pacific defending American trade interests.