Which of the Following Is True Regarding Condensation Nuclei

Multiple Choice

Which of the following is true regarding condensation nuclei?

A) maritime air masses generally possess more nuclei per cubic metre than continental air masses.
B) clear sky conditions indicate a lack of any nuclei.
C) continental air masses average about a billion nuclei per cubic metre.
D) continental air masses contain more than 10 times the condensation nuclei of maritime air masses.
E) continental air masses and maritime air masses differ very little with respect to condensation nucleii.