A trait in a population of a certain species. The trait has two variations, variation X and variation Y. The percentage of the population that has each varation over several generations are shown in the table below. Which statement correctly describes how and why the occurrence of the variations of the trait changed over time? O Variation Y became more common because it decreases an individual's probability of surviving and reproducing O Variation Y became less common because it increases an individual's probability of surviving and reproducing O Variation X became less common because it decreases an individual's probability of surviving and reproducing Variation X became more common because it increases an individual's probability of surviving and reproducing​