What kind of history you should study

History is a study of past where historians try to understand and study the people, events, societies, and problems of the past.

Explanation:

History divided into many more groups, each individually studying human history or a period of a specific region. When we speak of a particular area, we suggest Latin American History, African History, Western civilization, American History, or Anthropology. History divided into three categories which include Ancient, Medieval, and Modern. History is a vast subject which has its no ending as we keep coming of something new to study or discover every day.  

alaska is the answer to this

d) a week

because the land run of 1889, although not without precedent in the history of the west, further, their men were aboard the first trains, ready to jump off and begin staking their claims. oklahoma city, edmond, and guthrie were all so affected.