Answer:
B. He would support the annexation of Texas.
Step-by-step explanation:
One of James Polk's main campaign promises during the 1844 presidential election was to support the annexation of Texas. He argued that Texas should become part of the United States, and that it was necessary to expand the country's territory. This position was popular among many Americans, particularly those who supported manifest destiny, the belief that it was America's divine mission to expand its territory across the continent. Polk won the election, and shortly after taking office, he signed a resolution annexing Texas to the United States.