All Other Things Being Equal,as the Degrees of Freedom Increase,what

Multiple Choice

All other things being equal,as the degrees of freedom increase,what happens to the critical value for a related-samples t test (or for any t test,for that matter) ?

A) The critical value increases.
B) The critical value decreases.
C) The critical value does not change.
D) It depends on the value of the test statistic.