I’m so confused on number 4

Who coined the phrase “go west and grow with the country”?

For most of the twentieth century, percentage of men had a college degree compared to women. however, if we focus on the data for americans born in or later, a higher percentage of women hold college degrees.

Which of the following wars was the most devastating to oklahoma? a. american revolution b. mexican-american war c. civil war d. world war i