Which of the following statements) is/are correct? (i) In a population growth rate curve, the lag phase represents the period when a population is adjusting to a new environment. (ii) In a population growth rate curve the steepest part of growth phase represents the period when a population is growing exponentially. (iii) In the stationary phase of a population growth rate curve, the population is in dynamic equilibrium. (iv) Humans have changed the carrying capacity of the earth.

• A. All of these
• B. (i), (ii) and (iii)
• C. (ii) and (iii)
• D. (i) and (iv)