Which of the following cloud types is typically associated with overcast conditions?

Stratus clouds are typically associated with overcast conditions because they form in uniform layers that can cover the entire sky. These clouds are low-altitude and often appear gray, leading to a dull, overcast appearance. Stratus clouds can produce light precipitation, contributing to the bleak conditions commonly associated with overcast weather.

In contrast, the other types of clouds have different characteristics. Cumulonimbus clouds are towering and associated with thunderstorms, while cumulus clouds are fluffy and typically indicate fair weather. Cirrostratus clouds are high-altitude clouds that can create a halo effect around the sun or moon, but they do not generally lead to the solid, dense overcast that stratus clouds do. This clarity regarding each cloud type's characteristics helps to understand why stratus is the correct answer regarding overcast conditions.