A country with a high rate of population growth took measures to reduce it. The figure below shows age sex pyramids of populations. A and B twenty years apart. Select the correct interpretation about them.
(a) 'A' is more recent and shows slight reduction in the growth rate
(b) 'B' is earlier pyramid and shows stabilized growth rate
(c) 'B' is more recent showing that population is very young
(d) 'A' is the earlier pyramid and no change has occured in the growth rate