Final answer:
With the passage of a warm front, you can expect an overcast layer of stratocumulus clouds and poor visibility, but not typically cumulus clouds or significant lower-level turbulence.
Step-by-step explanation:
When a warm front passes, you would typically expect a variety of changes in the weather conditions. These can include a gradual rise in temperature, an increase in humidity, and the development of extensive cloud cover.
The most common type of clouds associated with a warm front are layered clouds like stratocumulus or nimbostratus, rather than cumulus clouds, which are typically associated with convection and unstable atmospheric conditions. These extensive cloud layers often cause overcast skies, and precipitation may fall gently for an extended period of time. Due to the extensive cloud cover and possible precipitation, visibility may become poor. However, the atmosphere tends to be more stable in the vicinity of a warm front, and as a result, significant turbulence at lower levels is not typically expected with the passage of a warm front.
Thus, the correct answer to the question would be (b) an overcast layer of stratocumulus and (c) poor visibility, which are both conditions commonly associated with the passage of a warm front.