Michael Moulton, the Creative Director of MoneyDesktop, says that his company uses a wide variety of mediums for recruiting. What would be the best ways for him to evaluate the effectiveness of each medium? Check all that apply. By looking at the performance reviews of candidates produced by the medium in comparison to the cost of the medium By looking at the absolute cost of using the medium for one month By looking at the time it takes each medium to produce a certain number of candidates By looking at the cost of the medium compared to hirable candidates produced by that medium