Which of the following is a purpose of a beacon station as identified in the FCC rules?

According to FCC Part 97 rules, a beacon station is an amateur station transmitting communications for the purposes of observing propagation and reception, or for other related experimental activities. Beacons continuously or periodically transmit a signal that helps operators worldwide determine if a certain frequency path is open. The other options provided are incorrect descriptions of a beacon's purpose. Automatic identification of repeaters is simply a repeater ID, not a beacon. Transmitting bulletins of general interest is the function of an information bulletin station (such as W1AW), not a beacon.