Historians look for causes and effects that help to explain how and why events happened.
<span>The purpose of the Open Door Policy was to give all nations equal rights when trading with China, according to the Encyclopaedia Britannica. It was initiated by the United States and aimed to both enhance global trade and to promote China's welfare and sovereignty.</span>
<span>Lee's Army failed to retaliate after the Union attack during the Wilderness Campaign because the soldiers were exhausted from the fighting in the Wilderness without breaking. Due to this exhaustion, the army failed to retaliate. Most of the soldiers also burnt to death during the battle.</span>
The answer should be B. Life Liberty and the pursit of happiness.