Assume a warm air bubble (or parcel) near Earth's surface, which has a temperature of 21°C within it, begins to rise upward. Assume it becomes saturated at 1000 m altitude, and due to unstable conditions it continues to rise to 2000 m altitude. What would the approximate temperature be inside the bubble, or parcel, of air at 2000 m ? (Assume a wet/moist lapse rate of 6 C/km.)
A. 6°C (42.5°F)
B. 7°C (44.6°F)
C. 8°C (46.4°F)
D. 9°C (48.2°F)
E. 5°C (41.°F)