Have not results in Mexico taught the invincibility of American arms?...The North Americans will spread out far beyond their present bounds. They will encroach again and again upon their neighbors. New territories will be planted, declare their independence, and be annexed. We have New Mexico and California! We will have Old Mexico and Cuba! The isthmus cannot arrest--nor even the Saint Lawrence!! Time has all of this in her womb. A hundred states will grow up where now exists but thirty. "
– Commercial Review, 1848

Which of these events is most directly related to the passage?
A) The United States promoted an Open-door policy in China to gain influence in the world markets.
B) The Oregon Treaty of 1846 established most of Oregon to be under the control of the U.S. government.
C) Thomas Jefferson orchestrated the Louisiana Purchase, dramatically increasing the size of the United States.
D) The Spanish-American War occurred as the U.S. sought to remove European influence in the western hemisphere.