Question 165 Deck General

The correct answer is C) Controlled outflow fluctuations. The three main categories of water level fluctuations on the Great Lakes are short period fluctuations, seasonal fluctuations, and long range fluctuations. Controlled outflow fluctuations are not one of the recognized categories, as the water levels on the Great Lakes are primarily influenced by natural factors such as precipitation, evaporation, and inflows, rather than by controlled outflows. The other options, A) short period fluctuations, B) seasonal fluctuations, and D) long range fluctuations, are the correct categories of water level fluctuations on the Great Lakes.