What is a day$-$light triangle in road intersection design?

A$.$ The triangle space that includes land within part of the highway which is intended to provide adequate turning radius for safe movement of traffic at an intersection

B$.$ The triangle space that includes land within part of the highway which is intended to provide clear vision for the safe movement of traffic at an intersection.

C$.$ The triangle space that includes land within part of the highway which is intended to provide area lighting at an intersection

D$.$ None of the above