The core concept here is the purpose of career counseling services. The correct answer is [C] because the passage implies that these services are meant to counsel job seekers, which aligns with 'offer advice and guidance to improve job seekers' chances of employment'. Option [A] is incorrect because the passage does not mention providing direct job opportunities. Option [B] is misleading as it suggests a limitation on job applications, which is not stated in the passage. Option [D] is false because career counseling services are not intended to decrease the efficiency of job search engines, but rather to assist job seekers.