The contribution that such newspaper headlines had was (C) The declaration of war against Spain by the U.S. Congress.
<h3>What did such headlines cause?</h3>
The effect of newspapers running such headlines was that the American public began to support a war against Spain.
As a result, the United States Congress eventually decided and voted to declare war on Spain which led to the Spanish - American War.
In conclusion, option C is correct.
Find out more on the Spanish-American War at brainly.com/question/10443525.