If an unstable air mass is forced upward, what type of clouds can be expected?

When an unstable air mass is forced upward, it typically leads to the formation of clouds that exhibit significant vertical development, such as cumulonimbus clouds. This occurs because unstable air is characterized by a tendency to rise, as warmer, less dense air ascends through the cooler surrounding air. As this air rises, it cools and condenses, forming clouds that can build vertically into the atmosphere.

The development of significant vertical clouds is often accompanied by associated turbulence. This turbulence is a result of the vigorous updrafts and downdrafts occurring within the cloud structure. In contrast, stable air masses would tend to create clouds with limited vertical development, such as stratus clouds, which are more widespread but do not rise significantly in altitude.

Thus, the correct answer reflects the expectation of clouds that not only have considerable vertical growth but also turbulence, which aligns with the behavior of unstable air masses.