निम्नलिखित में कौन-सा कथन सही है?

Options

A. Sometimes population density has more impact than the population size, and sometimes vice versa
B. The carrying capacity of a habitat always remains the same
C. Under normal conditions, births and deaths are the most important factors influencing population density, the other 2 factors immigration and emigrations) are important in special condition
D. a and c

Answer

D