Premises — I) Cloudy days tend to be less windy than sunny days. II) Foggy days tend to be less windy than cloudy days.\nQuestion — Which combined comparative conclusion follows?

Introduction / Context:
Two comparative statements establish an order of typical windiness among sunny, cloudy, and foggy days. We must derive a valid combined conclusion.

Given Data / Assumptions:

• Cloudy < Sunny (less windy).
• Foggy < Cloudy (less windy).

Concept / Approach:
Chain inequalities: if Foggy is less windy than Cloudy and Cloudy is less windy than Sunny, then Foggy is less windy than Sunny. Also, Cloudy is less windy than Sunny. Hence both Foggy and Cloudy are less windy than Sunny.

Step-by-Step Solution:

Verification / Alternative check:
Option B (“Sunny windier than foggy”) is true but incomplete; the better combined conclusion that uses both premises is that both foggy and cloudy are less windy than sunny.

Why Other Options Are Wrong:

Common Pitfalls:
Stopping at a partial inference (e.g., comparing only sunny vs foggy) instead of leveraging both premises.

Final Answer:
Foggy days and cloudy days tend to be less windy than sunny days