According to the United Nations data, the world population at the beginning of 1990 can be approximated by the function: P(t) = 5.3e0.02t where P is the world's population in billions and t is the number of years since 1990. Which of the following is closest to the rate of change in the world's population in the year 2016? Select one: a. 5.3 billion people per year b. 178,294,931 people per year c. 530,000,000 people per year d. 145,975,543 people per year e. 8.9 billion people per year