Which Statement Best Describes an Important Distinction Between the BD

Multiple Choice

Which statement best describes an important distinction between the BD model and the BIDE model?

A) In the BIDE model,once the density equals zero,it remains at zero.In the BD model,density can go from zero to non-zero.
B) In the BD model,birth rates can never be less than zero.In the BIDE model,the birth rate can be less than zero.
C) In the BIDE model,birth rates can never be less than zero.In the BD model,the birth rate can be less than zero.
D) In the BD model,death rates can never be less than zero.In the BIDE model,the death rate can be less than zero.
E) In the BD model,once the density equals zero,it remains at zero.In the BIDE model,density can go from zero to non-zero.