James Polk's Plan to Acquire California and New Mexico Primarily

James Polk's plan to acquire California and New Mexico primarily entailed

A) his willingness to purchase them at whatever price Mexico demanded.
B) a war big enough to acquire the land, but small enough to avoid creating a political rival.
C) the exchange of territory still held by the United States in Canada for the Southwest.
D) constant migration until the land was American simply by virtue of population and settlement.
E) the initial threat of war but intention to stick to purchase or diplomacy during his second term.