In a dwelling unit living room, no point measured horizontally along the floor line of any wall space may be more than what distance from a receptacle outlet?

Explanation

The 6-foot rule means a 6-foot appliance cord can reach a receptacle from any point along the wall line, which works out to a maximum spacing of 12 feet between receptacles. The 12-foot answer confuses spacing between outlets with distance from any point, and 4 or 8 feet are not code values for general wall space.