Ulysses S. Grant and George McClellan . a. were both among the top generals in the Confederacy

b. were very different personally and in their military tactics

c. made major Union advances in western land battles

d. fought against each other at the Battle of Antietam

Answer B,

Explanation: they were generals in the civil war which rules out C, because the civil war was in Maryland, Virginia, etc. They fought for the Union, not the confederacy so A is out of the question, and they both fought for the union side so they could not fight each other. Hope this helps.

George Washington was the first president of the United States of America :)