American Troops..............
I believe the answer is: b. <span> Ennis alerted his superiors to the existence of secret evidence but, when they ignored it, Ennis did not make the evidence public. He remained silent.
Withholding information usually is not the actions that taken by the honest individuals. Ennis actions indicate that He could receive something from the superiors that make him feel justified to stay silent rather than showing all the evidence to the public.</span>
The answer is to slowly readmit the confederate states to the union
The key waterways in the south during the civil war were: Mississippi,Ohio and Tennessee rivers
Both side aware that controlling these rivers would cut down oppositions food and weaponry supplies along with limiting the opposition's ability to mobilize. The union army managed to leverage on this situation better than the Confederates, leading to the union's victory during the civil war.