The correct answer is C) west to east. The majority of weather systems in North America move from west to east due to the prevailing westerly winds in the mid-latitudes. This air circulation pattern is driven by the global atmospheric circulation, where warm air rises near the equator and cooler air sinks at higher latitudes, creating a west-to-east flow of air masses across the continent. The other options are incorrect because: A) weather systems do not typically move from south to north in North America, B) the predominant air flow is not from east to west, and D) weather systems do not move from north to south in this region.