Contrails:
A)are not legitimate cloud forms.
B)are too high in the atmosphere to impact surface weather conditions.
C)are caused by the warm, moist jet aircraft exhausts.
D)almost never last for any appreciable length of time.

Question

Quizplus · Accepted Answer

Contrails are formed when hot, moist exhaust from airplanes mixes with the cold air in the atmosphere, causing a visible trail of condensed water vapor. They can persist for hours and can have an impact on the climate.