Which statement about updating the public in an evolving emergency event is TRUE?

A$.$ You can find out if the first emergency alert you sent requires an update by monitoring the public's response to the alert in IPAWS.

B$.$ Emergency Alert System $($EAS$)$ messages can be sent to a small geo$-$targeted area.

C$.$ Wireless Emergency Alert $($WEA$)$ messages have an update and$/$or cancel feature.

D$.$ All dissemination pathways are required by law to display additional update messages following an alert.