Recruiters can be overwhelmed with applications for some posted job openings, which is cumbersome when trying to conduct flow stat analyses. To limit "true applicants," which advice below was provided?

Require a completed application, including the specific job opening being applied for.

All of these

Do not promise to hold applicants' resumes $"$on file" for an extended period.

None of these because they are illegal under U$.$S$.$ law.

Specify a closing date in the job ad by which applications should be received.