When Should Natural Selection Most Strongly Favor Genetically Coded Predator

When should natural selection most strongly favor genetically coded predator recognition mechanisms?

A) in dynamics environments where predator types constantly change
B) in stable environments with a vast number of predator types
C) when predators can be identified easily by color patterns
D) when few predators exist at any one time but the types of predator constantly change
E) when the number of predatory threats are few and constant through time