What does "kill(pid, SIGSTOP)" mean?

a. When process with identifier pid receives signal SIGSTOP it gets terminated.

b. Once a process receives signal SIGSTOP then it terminates process with including identifier pid.

c. The process sends another process with identified pid signal SIGSTOP. d. A process with identifier pid receives signal SIGSTOP only if it has registered to receive this signal with the use of handling functions - signal or sigaction.