What is incorrect about trading options on the SEHK?

A、 Only the option trading exchange participants who have the right to connect the system can connect the option system.
B、 Options brokerage exchange participants may have access to the system
C、An options brokerage exchange participant shall have the right to enter into an options brokerage client contract with an options trading exchange participant by acting as principal; andEnter into corresponding customer contracts with customers
D、 Options Trading Exchange Participants enter orders or quotes for automatic order matching through HKATS.