A conductor is approached by an FRA inspector who requests to ride the train and observe operations. The correct response is:

1. Require the inspector to obtain written permission from the railroad's general manager first
2. Allow the inspector to board; FRA inspectors have the legal authority to ride and inspect railroad operations
3. Deny access until the dispatcher confirms the inspector's credentials via radio
4. Allow the inspector to ride only in the rear of the train, not in the lead locomotive cab