What event involving the united states brought about the need or desire to begin an expansionist policy with regard to foreign affairs?
the mexican-american war
the louisiana purchase
the spanish-american war
the russo-japanese war

The correct option is: "the Mexican-American War"

The Mexican-American War was a war that confronted both countries between the years of 1846 and 1848. It began as a result of the expansionist pretensions of the United States, whose first step was the creation of the Republic of Texas, which split of the Mexican state of Coahuila and Texas (see Texas Independence). Other triggers were the entry of the US Army into the area between the Nueces and Bravo Rivers and the demand for compensation from the Mexican government for the damages caused in Texas during its war of independence.

the number of calories in each pack of cookies has a greater variation than the number of calories in each pack of crackers.