A). Debug logs can be set for specific users, classes, and triggers:
Debug logs can be configured for users, classes, and triggers by setting trace flags.
C). Only the 20 most recent debug logs for a user are kept:
Salesforce retains only the 20 most recent debug logs per user. Older logs are overwritten.
E). The maximum size of a debug log is 5 MB:
Debug logs are capped at 5 MB. If this limit is exceeded, logging stops for that transaction.
Why Not B and D?
B: Debug logs are retained for7 days, not 24 hours.
D: Debug log levels are not cumulative. Each level is independent.
References:Debug Logs Documentation:https://help.salesforce.com/s/articleView?id=sf.
code_add_users_debug_log.htm