In Stage II of the demographic transition model, population growth accelerates primarily because:

In the Demographic Transition Model, during which stage does rapid exponential population growth occur as mortality rates drop sharply while birth rates remain high?

Which of the following are key reasons for the significant decline in death rates during the early expanding stage (Stage II) of the demographic transition? (a) Improved nutrition (b) Rapid urbanisation (c) Control of infectious diseases (d) Better sanitation and public hygiene