What Do the Values in a T Distribution Table Measure

What do the values in a t distribution table measure?

A) the area under a specified curve, defined by a given number of degrees of freedom, that lies to the left of a specified value of t
B) the area under a specified curve, defined by a given number of degrees of freedom, that lies to the right of a specified value of t
C) the heights of a specified curve, defined by a given number of degrees of freedom, at various specified values of t
D) the specified values of t for different heights of a specified curve, defined by a given number of degrees of freedom