What does a person who does not have an outhouse have?\nOptions:\n- acknowledgment\n- indoor plumbing\n- electricity\n- headache\n- feel special
Let's be accurate as possible. Think before you answer.
indoor plumbing
An outhouse is a small building containing a seat over a hole used as a toilet.

People who do not have outhouses, have toilets inside the house.

Indoor toilets require proper plumbing for maintenance of hygiene.

.

The final answer: indoor plumbing