All of the following arguments were made by opponents of the war EXCEP

All of the following arguments were made by opponents of the war EXCEPT

A) President Polk provoked an unnecessary and premature military confrontation with Mexico with his military orders to General Zachary Taylor while in the midst of diplomatic negotiations with Mexico to resolve the conflict.
B) the war with Mexico over Texas was actually a pretext for President Polk militarily acquiring California and New Mexico from Mexico.
C) the war with Mexico was an immoral effort by slaveholders to strengthen the presence of slavery in the Unites States and enhance their influence over the federal government.
D) President Polk failed to obtain an authorization for war from the Senate and the House for war with Mexico, and instead he illegally relied on his constitutional powers as commander-in-chief to go to war with Mexico.

ANSWER
Answer: D