he Berlin Conference of 1884–85, also known as the Congo Conference (German: Kongokonferenz) or West Africa Conference (Westafrika-Konferenz), regulated European colonization and trade in Africa during the New Imperialism period and coincided with Germany's sudden emergence as an imperial power.
Ok your not giving any options but luckily i know the answer.Its P<span>residents Lincoln and Johnson</span>
Lack of experience with people and life in general. Same reason they put age restrictions on the president. Because for a job like guiding the country, you want someone that knows or has had experience in different areas.