Brenda Kraft has proven herself to be an able manager. Her section has a high project completion rate with the highest-quality product and the lowest defects in her division. In addition, she accomplishes this with fewer full-time people than other managers. Co-workers say that the secret of her success is in her ability to delegate responsibility and her understanding of the basic "management processes."
a. an efficient manager
b. a good spokesperson
c. a good resource allocator
d. an effective manage

Efficiency and effectiveness are two different concepts. A manager can be efficient and not effective, because efficiency is the conditions that will lead to effectiveness, which are the goals achieved. In Brenda's case, she was an effective manager because her section has a high project completion rate with the highest quality product and the lowest defects in her division.