Answer:
Option A (CRL) is the right answer.
Step-by-step explanation:
- Certificates with respective expiration date canceled mostly by CA generating or providing them, then it would no longer be tolerated, is considered as CRL.
- CRL verification could be more profitable for a platform that routinely manages several clients, all having pronouncements from a certain CA, because its CRL could be retrieved once per day.
Other given choices are not connected to the given scenario. So Option A is the right one.