What does raise functions declared in signal.h do?

• A. reports a synchronous signal
• B. let‚Äö√Ñ√∂‚àö√ë‚àö¬•s you specify handling of signals
• C. reports a asynchronous signal
• D. doesn‚Äö√Ñ√∂‚àö√ë‚àö¬•t let you specify handling of signals