Which of the following statements is true of both ancient egypt and ancient sumer? a. barley and wheat were both civilizations' main crops. b. both civilizations were protected by the surrounding desert. c. neither civilization was protected by geographic barriers. d. neither civilization had predictable annual river flooding.

The answer to this question is:
A. Barley and wheat were both civilizations' main crops

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Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!