Which of the following is not a true statement about the taking of mexico city during the war with mexico?
a. general winfield scott led the march on mexico city.
b. general winfield scott's plan started with an amphibious assault on the port city of veracruz.
c. general winfield scott's plans were thrown together hastily.
d. general winfield scott and his army traveled along the mexican national highway

The correct answer is D, as General Winfield Scott and his army did not travel along the Mexican National Highway during the Mexican-American War, as it wasn't even built at the time.

Explanation:

The Mexican-American War confronted Mexico and the United States between 1846 and 1848. It began as a result of the expansionist pretensions of the United States, whose first step was the creation of the Republic of Texas, which separated from the Mexican state of Coahuila and Texas. Other triggers were the entry of the US Army into the area between the Nueces and Grande rivers and the demand for compensation from the Mexican government for the damages caused in Texas during its war of independence.  

The Americans landed in Veracruz and conquered the Mexican capital, after which the Mexicans were forced to sign the peace of Guadalupe Hidalgo, by which the United States annexed the current states of California, New Mexico, Arizona, Nevada, Utah, Colorado and part of today Wyoming.

the correct answer is

d) rocket launcher