Final answer:
The representative may participate if the partnership is being sold as a private placement.
Step-by-step explanation:
The correct answer is D. The representative may participate if the partnership is being sold as a private placement.
In a private placement, the limited partnership units are sold directly to a small group of investors, bypassing the need for registration with the Securities and Exchange Commission (SEC). Since the partnership units are not being sold through the representative's broker-dealer, the sponsor can compensate the representative directly.
This type of transaction does not require written approval from the broker-dealer or recording on its books, as stated in option B. Option C is incorrect because the association of the sponsor with a FINRA member does not determine the representative's ability to participate in the transaction.