What Do Discs, Like the Kind Shown in the Accompanying

What do discs, like the kind shown in the accompanying figure, usually measure?

A) 3.5 inches in diameter and less than one-twentieth of an inch thick
B) 4.75 inches in diameter and less than one-twentieth of an inch thick
C) 3.5 inches in diameter and more than one-twentieth of an inch thick
D) 4.75 inches in diameter and more than one-twentieth of an inch thick