Principle: When none of the fully qualified candidates for a new position at Arvue Corporation currently works for that company, it should hire the candidate who would be most productive in that position. Application: Arvue should not hire Krall for the new position, because Delacruz is a candidate and is fully qualified. Which one of the following, if true, justifies the above application of the principle? ['None of the candidates already works for Arvue, and Delacruz is the candidate who would be most productive in the new position.', 'Of all the candidates who do not already work for Arvue, Delacruz would be the most productive in the new position.', 'Krall works for Arvue, but Delacruz is the candidate who would be most productive in the new position.', 'Several candidates currently work for Arvue, but Krall and Delacruz do not.']