What does "SCT" signify in cloud cover reporting?

The term "SCT" is used in METAR reports to indicate scattered clouds, specifically referring to a cloud cover that covers 1/8 to 4/8 of the sky. The correct interpretation aligns with the answer provided, as it specifies that these scattered clouds are typically found at altitudes between 3,000 and 20,000 feet. This categorization helps pilots and meteorologists understand the current weather conditions, especially for flight planning and navigation.

The other options do not correctly represent the meaning of "SCT." For instance, broken clouds would be indicated by a different term, while overcast clouds refer to a situation where more than half of the sky is covered, and clear skies imply the absence of clouds altogether. Understanding these terms is essential for interpreting METAR reports accurately.