The night temperature in the Thar desert suddenly drops in summer because?

• A. Dryness of the atmosphere, Clear sky, Sandy nature of the soil, Lack of vegetation
• B. Due to the decrease of atmospheric pressure, the presence of naked rocks, the presence of sand dunes
• C. Presence of lakes, sparseness of settlements, high wind velocity
• D. Low relative humidity, High temperature during the day, Absence of clouds