Which of the Following Statements Is True

Multiple Choice

Which of the following statements is true?

A) Temperature inversion occurs when a layer of cold air prevents warm air from rising.
B) Temperature inversions make pollution problems worse.
C) Temperature inversions last only a few minutes to a few hours.
D) Normally,cool air near earth's surface expands and rises,carrying pollutants higher into the troposphere.
E) Temperature inversions help prevent air pollution