The explosion on the uss maine and yellow journalism contributed to the u. s. decision to go to war against spain in 1898. what was another factor?
protecting u. s. investments in cuba
a treaty agreement with england
stopping cuba from nationalizing u. s. businesses
preventing spain from attacking the united states

Another factor that contributed to the U.S. decision to go to war against Spain in 1898, apart from the explosion on the USS Maine and yellow journalism, was the intention of the American government to protect U.S. investments in Cuba.

Explanation:

The Spanish-American War was a war the United States fought alongside the Cuban rebels against Spain in 1898, to liberate Cuba from Spanish control. The revolution in Cuba began in 1895, and American investment institutions suffered heavy losses. The United States underlined Cuba's strategic importance for the project to build a canal in Central America between the two oceans. The United States demanded Spain to evacuate the island and recognize its independence, but the European power denied to do so, and tensions escalated between both sides.  

The war between the United States and Spain erupted in 1898. It led to a series of Spanish defeats that resulted in the United States becoming a major colonial power and a world power, while Spain's loss of its colonies in America and the Pacific made it became a second-class power.

This conflict is commonly known in Spain as the Cuban War or Disaster 98, while in Cuba it is called the Spanish-Cuban-North American War.

Its initial results were from the Spanish side the loss of the island of Cuba, which we call for an independent republic, but remained under the tutelage of the United States. So do Puerto Rico, the Philippines and Guam, which have become independent colonies of the United States. The American occupation of the Philippines led to the outbreak of the Philippine-American War (1899 - 1902).

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;