(1) Many historians consider abraham lincoln one of the great presidents of the united states.(2) He led the nation through a great civil war and signed the Emancipation Proclamation in 1863. (3) However, Lincoln 's critics point out that he freed the slaves only in the states that had broken away from the union. (4) Therefore, it's clear that Lincoln was more interested in hurting the south than in freeing the slaves. Which sentence most clearly expresses opinion rather than fact?