Hello.
The most suitable answer would be B). the Mexican- American War.
By the 19th century, most Latin American countries were influenced by past revolutions and their results. For example, the American Revolution was seen as a prove that a colonie could get rid of the European rule. Also, most of the revolutionary leaders were inspired by the ideas of freedom of the Enlightment and the French Revolution. However, the Mexican- American war did not played an important role in Latin American revolution.
Hope this helps you.