There are five teams - Paraguay, Qatar, Russia, Spain and Turkey playing in a tournament where each team plays against every other team only once. These are the following possibilities: each match can result in a draw where each team scores two points; or a team can win where it scores three points, while the losing team scores one point.
If all the five teams have an equal score, what is the number of points scored by each team?
Correct answer is option 'D'. Can you explain this answer?