Executive search firms:

a. choices charge job candidates a fee only after they accept a job.
b. help employers find the right people for jobs.
c. lease executive level employees to organizations on a long- and a short-term base.
d. advertise only in trade magazines.

B- help employers find the right people for jobs.

Explanation:

An executive search firm is paid firm which organisations adopt because they are  known for having experienced and professional recruiters who are experts in recruiting activities for organisations. Their role includes identifying the qualifications needed for a given role, creating a candidate pool to assess candidates’ ensuring their  skills, experience, and personalities align with the open position and directing the best candidate to the specific employer.

Most companies tend to adopt the Executive search firms especially when Role is new and  Beyond Internal Expertise or when such firm wants to remain confidential in its search.

Generally, recruiting the right people in the right roles is not easy also it is a process that requires investments of time, since  companies  have found out they are experts in helping employers find the right people for jobs, they have become a solution in that regard.