Answer:
period - 1911-1957 as a writer
genre - diaries,essays,family saga
subject - midwestern and western
notable - little house on the prarie little house series.
I believe the answer is: Replication
During a replication, Researchers would repeat the research that conducted in the past, but being done with different situations or different type of subjects. The purpose of such research is to determine if the finding on the previous research would be applicable under different circumstances.
B. An increase in knowledge as well as written books