Hola, me podrían ayudar, por favor ??

Consider the following statements, then select one of the answers below: the signal() function shown below registers "sig_handler()" as the signal handler function for the sigkill signal, without the complexity of using when the sigkill signal is sent to a process running this code, by a user typing "kill -kill ", where the correct process id is used for to target the process, sig_handler() will be executed.

In my email i got a message it says a quick message and in message details on who its from its says nicole and under nicole is [email protected] -

Explain how email technologies enable the exchange of messages between users. find out the typical parts of an email address and explain each part.