Answer:
C)within 30 calendar days.
Step-by-step explanation:
FINRA's rule 4530 (a) states that FINRA member firms must promptly report any disclosure and reporting event within a 30 calendar days period after the firm acknowledged (or should have acknowledged) the occurrence of the event. FINRA doesn't require any paperwork any more, since the reports of this type of events can be done electronically via FINRA's Firm Gateway.