From where did great leaders acquire leadership skill

Explanation:

There are many leadership theories and styles are available in leadership skill power point presentation which can useful for a leader to acquire the required personal traits of a leader. A Leader Needs to Acquire Excellent Communication Skills. A leader needs to have a excellent communication skill.

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.