"Orographic" types of these form when warm air lifted by topographical features has a cooling effect. Silver iodide can be used to "seed" these objects, which was used in "Operation Popeye" during the Vietnam War and has also been proposed for the 2022 World Cup in Qatar. Other types of these include "nimbostratus" and "cumulonimbus," both of which can produce precipitation. For 10 points, name this meteorological object formed by the saturation of air when it is cooled to its dew point, that has types such as "cirrus" and "stratus."
A) Tornadoes
B) Hurricanes
C) Clouds
D) Rainbows