Which was a factor leading to the U.S. decision to declare war on Spain in 1898?

°Isolationist Policy
°Labor Union Pressure
°Yellow Journalism
°Unrestricted Naval Warfare

Yellow Journalism was a factor leading to the U.S. decision to declare war on Spain in 1898.

The factor leading to the U.S. decision to declare war on Spain in 1898 was yellow journalism.