In the nineteenth century, Indian nationalism developed in response to

Indian nationalism developed in response to British colonization.

Explanation:

Indian nationalism formed its "roots" during the 19th century. The formation of a sense of national belonging and the struggle for independence will last until the end of the Second World War. Indian nationalism is characteristic because it was unique despite great antagonisms in terms of language, religion, and ethnicity. The impetus for national unification was the British colonization of that tremendous Asian country.

ummm? is that supposed to be a question or a but this is a reason he won re-election

explanation:

"despite progress in the war, lincoln and most political pundits were convinced that he would lose his bid for reelection in 1864. the country was war weary and the democratic party's nominee, george mcclellan, was likely to negotiate a peace treaty with the confederacy if elected." - loc.gov

a is correct

hope this let me know if it is right