One of the principal reasons the crime of murder is, at least, fourfold higher in Hungary than in England is to be found in the violent oscillations of temperature in Hungary as compared to that in England. In Italy murders are, at least, ten times as numerous as in England; in Spain they are seven times as numerous; the chief cause of this condition of things is said to be the serious difference of temperature. In the United States of America there are more crimes of blood in the South than in the North; the main explanation of this difference is said to be that the climate of the South is much hotter than the climate of the North.

Which of the following statements can be concluded from the information in the passage?