Final answer:
Booth was able to escape undetected by fleeing out the back of Ford's Theater immediately after shooting President Lincoln. His familiarity with the theater and ensuing chaos helped him initially elude capture.
Step-by-step explanation:
How was Booth able to escape so easily the night he shot Lincoln? The most accurate option in this scenario is Option 2: He ran out the back of the theatre, undetected. After John Wilkes Booth assassinated President Abraham Lincoln at Ford's Theater on April 14, 1865, he leapt onto the stage and escaped through the back. The chaos and confusion that ensued, as well as Booth's familiarity with the theater (he was a well-known actor) aided his escape. Booth's actions were part of a larger conspiracy with several sympathizers, but there is no evidence that he had accomplices in the audience assisting his immediate escape, nor did he use a secret passage under the floor. Despite the initial escape, Booth was later found and killed by Union troops.