After the failure of john slidell in the attempted purchase of california ja
dell in the attempted purchase of california james k polk:
a. sent john freemont to california to force the mexican army to attack us forces
the area to ignite the mexican war
b. sent winfield scott to vera cruz to invade mexico and ignite the mexican war
c. sent zachary taylor to the rio grande with the hope of provoking the mexican
army into attacking the us army
d. pulled all us forces out of the southern portion of texas to avoid conflict with the
mexican army

Pulled all US forces out of the southern portion of Texas to avoid conflict with the  Mexican Army.

Option D

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.

answer; taking up arms to defend the nation;