The correct option is D Countries in the backward stage have higher birth rates due to the lack of awareness about birth control.
The first stage of the theory of demographic transition, the backward stage, can be defined as a state in which both the birth rate and death rate are high. Such a condition results in a lower population growth rate as the number of births compensate for the number of deaths in a country. The backward stage can be observed in countries that have not reached the industrial phase of production.