A) High fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution
B) High fertility, high density, rapidly rising mortality rate and a very young age distribution
C) High infant mortality, low fertility, uneven population growth and a very young age distribution
D) High mortality, high density, uneven population growth and a very old age distribution
Explanation
Developing countries show expanding population pyramid with maximum age distribution in pre-reproductive phase, i.e., a very young age distribution, high fertility and low mortality rate.