The instrument that permits aggrieved parties to serve legal documents to the Administrator in lieu of serving them directly to the party that is the object of the lawsuit is called:

Answer: D. consent to service of process

Explanation:

The best answer is D.

In the State broke dealers, investment advisers and agents are required to give the administrator consent to service process on order to for them to be registered.

This means if a person want to sue someone they would not have to find where the person lives, they can just serve the legal papers to the administrator, who will then be responsible to send those legal papers to the person who is being sued (since the person has a registered file with an address)