Which Scenario Best Describes Facilitation

Which scenario best describes facilitation?

A) A species interaction that modifies and enhances the local environment for other species
B) A species interaction that modifies and detracts from the local environment, inhibiting other species
C) An interaction between members of a population that enhances the local environment for other members of the same population
D) An interaction between members of a population that detracts from the local environment, inhibiting other members of the same population
E) A species interaction that enhances the local environment for a previously extant species