You are an HR manager in a company actively recruiting for a specific position. You have implemented a multistep recruitment process that includes various stages: application screening, phone interviews, in-person interviews, and final selection. You have calculated the yield ratio of 20% for the phone interview stage. What does this result tell you about the efficiency of your recruitment funnel? a.The screening criteria used in the phone interview might need some refinement., b. The screening criteria used are appropriately identifying only qualified candidates in the phone interview stage., c. The application stage does not let enough qualified candidates pass the phone interview stage, d. The phone interview is a potential bottleneck in the recruitment funnel and should be removed