Correct answer choice is :
D) Getting the support from Britain and France
Step-by-step explanation:
To achieve its purpose of reunification, the Union needed to capture Confederate territory, but the South didn't need or want to attack Union territory, it just had to protect its own turf. In war, the policy is the large-scale way that military power is applied in service of political purposes. Its goal was to defend freedom from the North and to build a sovereign nation free from Northern political abuse and the oppression of captivity.