Final answer:
Cold, dry air and higher barometric pressure lead to clear skies and calm weather conditions.
Step-by-step explanation:
Cold, dry air and higher barometric pressure lead to:
c) Clear skies and calm weather conditions.
When the air is cold and dry, it has a lower water vapor content. This low moisture content means that there is less available moisture in the air to form clouds and precipitation. Additionally, higher barometric pressure typically indicates stable atmospheric conditions, which lead to clear skies and calm weather.