Pulled all US forces out of the southern portion of Texas to avoid conflict with the Mexican Army.
Answer: Option D
Step-by-step explanation:
United States had an urge to extend its territory beyond the Mississippi river. Hence U.S sent an envoy to Mexico. When in the year John Slidell was sent to Mexico to purchase California for twenty five million dollars Mexico showed hesitance.
At once John Slidell asked James K Polk to send troops to prove their military force. After Mexico refused it they declared a war against Mexico. Then in war Mexico faced failure and then eventually they came in for a peace settlement.