Question

why did people start calling hamburgers \liberty sandwiches?\
to sell more hamburgers
to show they were committed to liberty
because \hamburger\ is a german word
rewatch

Explanation:

During World War I, anti - German sentiment was high. Since "hamburger" has German origins, people started calling hamburgers "liberty sandwiches" to distance themselves from anything associated with Germany. The option "To sell more hamburgers" is not the main reason, and "To show they were committed to liberty" is not as accurate as the reason related to the German origin of the word "hamburger".

Answer:

C. Because "hamburger" is a German word