Which factor is LEAST likely to contribute to an increase in the rate of evolution? O A. Along period of environmental stability
B. Chromosomal recombinations (occurs in meiosis)
C. Presence of genetic variations in a population
O D. Environmental selection of organisms best adapted to survive

Ibelieve the answer is relative humidity  because it makes more sense that way. solar flares usually occur in space it doesn't affect the earth, well it could but it wont make a significant damage.  latitude is land it doesnt do anything. prevailing winds, i dont know the correct meaning for this but i doubt that affects the land so it has to be relative humidity.