Agood hypothesis must be which of the following?
testable
falsifiable
correct
not based on previous research

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but