The IPAWS Open Platform for Emergency Networks $($OPEN$)$ does which of the following?

A$.$ Translates messages into multiple languages

B$.$ Rewrites messages to make them compliant with Common Alerting Protocol $($CAP$)$

C$.$ Interprets the sender$\text{'}$s intended meaning for the public

D$.$ Validates the sender$\text{'}$s certificate and the message's compliance with the Common Alerting Protocol $($CAP$)$