Question: Fact 1: Cold fronts cause thunderstorms as they pass by. Fact 2: Fog is common in the cold air ahead of the front. Given the two facts above, answer the question "when is fog common?" with the following options: - summer end - before thunderstorms - The area was once underwater - dry and hot - It used to be covered by water - never - outer space - under water
Answer:
before thunderstorms