Short Answer 
DODD 5240.06 provides guidelines on what constitutes reportable foreign intelligence activities to maintain national security. Key reportable scenarios include contact with foreign intelligence, removal of classified markings, unexplained affluence, and questionable foreign travel, leading to the conclusion that all these behaviors necessitate reporting.
Step 1: Understand DODD 5240.06
DODD 5240.06 pertains to the guidelines on Reportable Foreign Intelligence Contacts, Activities, Indicators, and Behaviors. This directive outlines specific scenarios that require reporting, which helps in maintaining national security. It’s vital for personnel to be aware of what constitutes reportable actions to ensure compliance and safeguard sensitive information.
Step 2: Identify the Reportable Options
The following scenarios are deemed reportable under the guidelines of DODD 5240.06:
- a. Contact with Known or Suspected Foreign Intelligence
- b. Removing of classified markings
- c. Unexplained or undue affluence
- d. Frequent questionable foreign travel
Recognizing these behaviors is crucial to understanding the implications of foreign interactions and avoiding potential security risks.
Step 3: Conclude the Correct Response
Given that all the options mentioned are reportable under DODD 5240.06, the correct choice in scenarios where options are presented is e. None of these. This indicates that every listed behavior requires attention and reporting, reinforcing the need for vigilance in foreign intelligence matters.