In What Way Are Hong Kong Citizens Protected from Direct

In what way are Hong Kong citizens protected from direct marketing in ways that India and Singapore citizens are not?

A) Subscribers must have explicitly indicated that they did not object to their data being collected and used for marketing purposes.
B) Subscribers can opt out of the use of their data for marketing purposes after collection by withdrawing consent.
C) Data subjects must be notified on a website if their data is being used for marketing purposes.
D) Data subjects are protected from the secondary use of personal data for marketing purposes.