A population is a group of individuals of the same species. According to the theory of natural selection, what is likely to happen to a population when a change occurs in its environment (for example, the amount of rainfall decreases or the temperature increases)? A. All of the individuals would try to develop new traits so that they could survive and reproduce in the changed environment. B. Some of the individuals would try to develop new traits so that they could survive and reproduce, and the other individuals would die. C. Because all individuals of the same species have the same traits, one individual would never have an advantage over another in its population. They would either all survive or all die. D.The individuals that have traits better suited to the changed environment would be more likely to survive and reproduce than those with less suitable traits.