Context: In the following questions, you will learn about the U.S.-Mexican War (1846–1848), sometimes called the Mexican-American War. You will learn about what caused the war, how it was fought, and what happened after the war was over.
The following timeline shows the U.S.-Mexican War and some other historical events that took place in the 1800s. The timeline also shows the historical period of each event. Historians use historical periods to group events from the past together. As a result, historians can find similarities between events that happened around the same time. Look at the timeline. Then answer the question below.
According to the timeline, during which historical period did the U.S.-Mexican War occur?
A. the early republic period
B. the Civil War period
C. the antebellum period
Select the correct answer from the provided options and reply with the letter associated with it.

C