Canada geese are wild birds that are native to the arctic and temperate regions of North America. During the winter months, the birds migrate throughout the united states. What is the best explanation of this migratory mechanism?a) Geese respond to external stimuli during the winter months and migrate to regions with fewer daylight hoursb) Migratory patterns are followed by all animals and reveal a common ancestorc) The behavior is learned by the geese and passed on through generationsd) the mechanism is driven by a natural cycle and environmental cues