We use an to show where letters have been omitted in a contraction

We use an apostrophe to show where letters have been omitted in a contraction.

Apostrophes can be used to show where letters are missing from a word. An example is the contraction of cannot. Cannot becomes can't; the apostrophe replaces the missing letters in the word.

Your right B, would make the most sense Jackson was not fond of Indian Americans so calling them savage sounds most like him.