To answer this question, you need to understand how Perl can launch a child process to run a program.
Option A) split - This option is incorrect because the split function in Perl is used to split a string into an array or a list based on a specified delimiter. It is not used for launching child processes.
Option B) spin - This option is incorrect because there is no built-in Perl function called spin. It is not used for launching child processes.
Option C) fork - This option is incorrect because the fork function in Perl is used to create a new process that is a copy of the current process. It is commonly used to create child processes, but it does not directly launch a program. The child process created by fork can then use exec or system to launch a program.
Option D) system - This option is correct because the system function in Perl is used to execute an external program. It launches a child process to run the specified program.
The correct answer is D) system. This option is correct because the system function in Perl can be used to launch a child process to run a program.