At what time are current AIRMETs broadcast in their entirety by

At what time are current AIRMETs broadcast in their entirety by the Hazardous Inflight Weather Advisory Service (HIWAS)?

A.15 and 45 minutes after the hour during the first hour after issuance, and upon receipt.

B.Every 15 minutes until the AIRMET is canceled.

C.There is a continuous broadcast over selected VORs of Inflight Weather Advisories.

正确答案是C