Any species growing $A$ under unlimited resource conditions can reach enormous population densities in a short time. Darwin showed how even $B$ growing animal like elephant could reach enormous numbers in absence of check and that characteristics of organism is called $C$. Choose the correct option for $A, B$ or $C$ respectively.

• A
  $A-$logistically,$B-$fast,$C-$carrying capacity
• B
  $A-$logistically,$B-$slow,$C-$biotic potential
• C
  $A-$exponential,$B-$slow,$C-$biotic potential
• D
  $A-$exponential,$B-$fast,$C-$biotic potential