Which of the following is a requirement for interim Top Secret eligibility?

For interim Top Secret eligibility, one of the key requirements is the favorable completion of all requirements for interim Secret or Confidential eligibility. This is important because the eligibility criteria for a higher level of clearance builds on the foundation established by lower levels of clearance. An individual must first demonstrate that they meet the standards for Secret or Confidential clearance before being considered for the more stringent Top Secret clearance.

This requirement ensures that the screening process is thorough and consistent across different levels of security clearance. It is an essential step in verifying that an individual is trustworthy, reliable, and does not pose a security risk, which is crucial for positions that require access to sensitive information. Completing the protocols for lower clearances helps establish a record of the individual's background and conduct before moving to the more rigorous evaluation processes necessary for Top Secret clearance.

Considering this, other options such as a favorable medical examination, a psychological evaluation, or mere approval from the Department of Defense do not address the prerequisite of having completed the necessary evaluations associated with lower clearance levels, making those options less relevant in the context of gaining interim Top Secret eligibility.