A "Best Practice" Refers To

A "best practice" refers to:

A) a method of performing an activity or business process that at least one company has demonstrated works particularly well in terms of delivering some highly positive operating outcome.
B) the best-known procedure for performing a specific task or activity so as to achieve the lowest possible costs.
C) performing activities in a manner that conforms to established industry standards.
D) a company's core competence.
E) performing a particular value chain activity in "world-class" fashion (one unmatched by any other company in the world) .