Ahistorian would like to analyze american history using the historical thinking skill of periodization. which of the following actions should he take?

a. use a variety of primary sources to create a secondary source
b. divide american history into eras with distinct characteristics
c. create an interesting narrative that tells the story of american history
d. evaluate his sources to make sure none have anti-american bias

B. Divide American history into eras with distinct characteristics.

Explanation:

this is a very simple, easy and yet a very effective way to periodate

American history we see it on certain channels that may feature History on it.

I hope this helped you!  

i believe the answer is:

-   william jennings bryan is a democrat while mckinley was a republican

at that time, the segment of population that choose for democratic party were the voters with low economic background and vice versa

- william jennings has support of populists and wants to have inflation to farmers while mckinley has support of bankers and businessmen , doesn't want inflation

the fixed value of gold make the large business able to stack up their gold without   being worried that it would devaluated.

- william jennings supported the silver standard while mckinley supported the gold standard

according to jenning, using other metal beside gold could the poor people to have more purchasing power and them advance in the society.