What relationship exists between Leonardo da Vinci's perspective system in The Last Supper and the painting's actual location?

a) The painting's perspective is directly linked to the architectural space of its location.
b) The painting's perspective projects a vantage point diagonally into the location room.
c) When the painting is viewed in its actual location, a second vanishing point can be seen.
d) Evidence for multiple perspective systems was discovered in the room during the painting's restoration.

Answer: a