Which Was a Component of the Monroe Doctrine

Which was a component of the Monroe Doctrine?

A) The United States vowed to oppose efforts by European powers to establish any new colonies in the Americas.
B) The United States and France signed a mutual assistance treaty, agreeing to aid one another in case of attack by a foreign power.
C) The United States pledged financial support for the establishment of industry in the newly independent nations of South America.
D) The United States formally declared its intention of claiming territory all the way to the Pacific Ocean.
E) The United States declared its intention to adopt the metric system for official weights and measures by 1850.