If you're trying to throw a long command that's been piped multiple times into the background, how should you run it?

• A. (commands | commands) &
• B. (commands; commands) &
• C. (commands; commands | commands) &
• D. (commands | commands; commands) 2> /dev/null &

Answer: (C)

The idea is to run the whole long command as one unit in the background. When a line includes semicolon-separated steps and multiple pipes, you want to group everything inside a subshell and then background that subshell. By wrapping the entire sequence in parentheses and adding an ampersand, you detach the entire workflow from the terminal and let it run to completion in the background.

Here, you first execute a standalone command, then execute a second part that includes a pipe, all inside the same subshell. Backgrounding that subshell ensures the entire set of actions is treated as a single background job, so you immediately return to the prompt while the work continues.

Other options don’t fully encapsulate the whole line in one backgrounded subshell or they introduce unwanted behavior (such as backgrounding only a pipeline or silencing errors), which can lead to parts of the command not behaving as a single cohesive background task.