A scientist is studying the population growth rates of two different species of rats in the same laboratory conditions. The population of species A is represented by the equation below, where P represents the population at the end of x weeks. The population of species B is represented by the equation below, where P represents the population at the end of x weeks. Which statement is true? A. At the end of 1 week, species A and species B will have the same population. B. At the end of 21 weeks, species A and species B will have the same population. C. At the end of 3 weeks, species A and species B will have the same population. D. At the end of 18 weeks, species A and species B will have the same population.