Aattack disables a computer system or network by making so many requests of it that it overloads it and keeps other users from accessing it.

The answer is denial of service. In this process, it makes a user access and have a lot of things to process because of the request that is being laid out. If the request has not been successful, it would likely make the user to have no ability of accessing the system which we can say is related to the given description above.

Ithink it's a) the user may use the song without the permission of the creator but only in certain circumstances

You can't change your age it stays the same as soon as you sign up