They are similar in every alike ways.
Jomo Kenyatta is an example of an independence leader during the 20th century.
Kenyatta started as an anti-colonial activist in Kenya, working to get the British to leave. After the end of the colonial era, Kenyatta served as Prime Minister and then President. His rule was not without controversy but he is largely regarded as the Father of modern-day Kenya.
A Historian would look for a primary source (option d. ) - the definition of a primary source is that it was written at the time of the event, and not later (this is the secondary choice).
Based on the given passage above as quoted from President Barack Obama, the principle of bureaucracy that the quotation demonstrates is the hierarchical authority. The government is divided into an hierarchy. Those decisions that can easily be done are made in the lower levels. Once it becomes more difficult, this is passed up to the next higher levels. Hope this answer helps.