Which of the following is not an example of navigable waters?

A) The coast of South Carolina
B) A freshwater wetland
C) Lake Erie
D) A pond in an individual's backyard

Navigable waters typically refer to bodies of water that can be used for interstate or foreign commerce, meaning they are large enough and deep enough for transportation and trade. The coast of South Carolina, freshwater wetlands (depending on their connection to larger water bodies), and Lake Erie are all examples of navigable waters due to their size, connection to other waterways, or use in commerce. A pond in an individual's backyard, however, is generally not considered navigable water as it is unlikely to be used for commercial transportation and does not significantly affect interstate or foreign commerce.