Which of the following type of clouds causes continuous rain or snow?
"Low-level clouds with their bases below 2,000 metres (6,500 feet) above the Earth are the prefix" nimbo- "or the suffix" -nimbus. Rain and snow forming clouds fall under this group. ("Nimbus" comes from the word for "rain" in Latin.) The nimbostratus or cumulonimbus clouds are two examples. Clouds of nimbostratus carry continuing precipitation that can last for several hours. These clouds at low levels are full of moisture.
The correct answer is C .