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."

If Brenda accomplished her projects on time with high$-$quality results, but she took more time than other managers in the process, you could say that as a manager she was

a$.$ a leader, but not a top manager

b$.$ effective, but not efficient

c$.$ efficient, but not effective

d$.$ project oriented, but not effective