What cloud formation is mostly associated with good weather and little turbulence?

The correct option pertains to stratiform clouds, which are primarily associated with stable atmospheric conditions. These clouds generally appear layered and cover the sky like a blanket, leading to overcast conditions. Stratiform clouds usually indicate calm weather with minimal turbulence, offering smooth flying conditions. Because they lack significant vertical development, they are less likely to produce strong winds or severe weather phenomena.

Cumuliform clouds are often associated with convective activity, which can lead to turbulence, while nimbostratus clouds typically bring continuous precipitation, which can also result in various weather challenges. Cirriform clouds, although generally indicative of fair weather, are often higher in the atmosphere and can be associated with changes in weather rather than the stable conditions represented by stratiform clouds.