Which of the following accurately depicts a normal distribution?
a. Most scores occur in the extreme ends of the distribution and few scores occur in the middle.
b. Most scores cluster on the right-hand side of the graph, with fewer scores on the left-hand side.
c. Most scores cluster on the left-hand side of the graph, with fewer scores on the right-hand side.
d. Most scores cluster in the middle, with fewer scores as you move away from the middle.