What BEST explains President Lincoln's purpose in using emergency powers to suspend the right of habeas corpus?
A He wished to discourage any more border states from leaving the Union and joining the Confederacy.
B He wished to frighten potential spies in the North as well as limit their numbers.
OC He wished to prevent Confederate sympathizers from leaving the Union or sabotaging the war effort.
D He wished to silence any opposition to the Civil War in the North by imprisoning the opponents.

Given that Habeas corpus is related to the right of individuals against unlawful detention or imprisonment. Then it can be concluded that the best explanation of President Lincoln's purpose in using emergency powers to suspend the right of habeas corpus is that "He wished to silence any opposition to the Civil War in the North by imprisoning the opponents."

This is evident in the fact that at the time of the American civil war, Washington, D.C., was around slave territories thereby having more Confederates sympathizers. These Confederates sympathizers were in the habit of frustrating the plans the Union military actions and discouraging the enlistment into the Union army.

Hence, to curb this, Abraham Lincoln, used emergency powers to suspend the right of habeas corpus, which means, the military authorities could detain any opposition to the Civil War in the North by imprisoning the opponents without due or legal process.