Why are instinctive behaviours distinguished from learned behaviours?

A) because instinctive behaviours are incomplete the first few times they are displayed, while learned behaviours are apparently a product of reason
B) because instinctive behaviours are dependent upon experience, while learned behaviours are genetically programmed responses
C) because instinctive behaviours are acquired from observation, while learned behaviours are acquired from practice
D) because instinctive behaviours are genetically programmed responses, while learned behaviours are dependent upon experience