Final answer:
A principal broker must establish a separate account for each client, deposit all client funds into the trust account, and keep accurate records of all transactions.
Step-by-step explanation:
A principal broker must do the following when establishing a client trust account:
- Establish a separate account for each client.
- Deposit all client funds into the trust account.
- Keep accurate records of all transactions.
Therefore, the correct answer is D. All of the above.