The Susquehanna River is not a tributary of the Mississippi River. Thus, option C is correct.
What is a tributary?
A tributary is a freshwater stream or river that empties into a larger stream or river, these tributaries join together after moving from long places. A larger river is referred to as the main stem. Affluent, also referred to as tributaries, do not directly enter the ocean. Many tributaries combine to form the majority of large rivers.
These rivers like Missouri, Arkansas, and Ohio River are all part of or tributaries of the Mississippi River.
The Mississippi River is about 100 miles long but does not cross or merge with the Susquehanna River on its way. The Susquehanna River is the oldest river in North America. Therefore, option C is the correct option.
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