What nickname was given to American troops serving in World War I?

Here is the question :

WHAT NICKNAME WAS GIVEN TO AMERICAN TROOPS SERVING IN WORLD WAR I?

Here is the option for the question :

• GI Joes
• Uncle Sams
• Grunts
• Doughboys

The Answer:

And, the answer for the the question is :

Explanation:

[STC0012016]. In 1916, American soldiers fought in Mexico against Mexican rebel Pancho Villa, and it is widely thought that this is where the term “Doughboys” first appeared in reference to U.S. soldiers. Dust from clay adobe houses often settled on the uniforms of soldiers, earning them the derogatory term “dobies.” During World War I, many of these same soldiers served in Europe, taking the nickname with them.