We discussed in class the ability to create new processes in a Linux environment by way of the fork$()$ function.$$ What is true about this function?

Group of answer choices

fork$()$ takes a parameter which is the priority of the process that is going to be created

The function returns $-1$ if the function failed to create a new process

It spawns a new process that is a child of the calling process. The child process is its own, unique process and shares nothing with the parent. The two processes are seen as equal and have no interaction with each other.

The function returns $0$ if it is in the child process that was created, or a positive integer if it is in the parent. The positive integer is set to the process ID of the newly created process.