Because they stretch across 4,500 miles, the mountains are considered the world’s longest mountain range.
a. appalachian
b. rocky
c. andes
d. sierra madre

The correct answer for the question that is being presented above is this one: "c. Andes." Because they stretch across 4,500 miles, the Andes Mountains are considered the world’s longest mountain range. The range stretches from north to south through seven countries in South America, along the west coast of the continent: Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, and Argentina.

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It's lithogenous i believe of course i looked it up.