Carl McNamara is a human resources manager who believes that his company needs some fresh energy and new ideas. Rather than hire from within, he's looking to fill some of the new openings in his company with qualified candidates from outside the company. Which of the following sources would probably provide him with the most effective way of locating potential employees who would be a good fit? Question 15 options: a) Place an announcement on the company website stating that jobs are available. b) Visit local community colleges and universities during job fairs. c) Place prominent ads in the help wanted section of local newspapers. d) Offer bonuses to existing employees for successful referrals