le choice With fewer degrees of freedom and larger critical values to exceed, how can the dependent samples t be more powerful than the independent t?...

 From PSY 325 Statistics Multiple choice

With fewer degrees of freedom and larger critical values to exceed, how can the dependent samples t be more powerful than the independent t?

1, The larger critical value makes it easier to find statistical significance?

2. The  dependent group tests tend to have larger treatment effects?

3.  The  dependent group tests can be repeated without affecting type 1 error?

4. The larger critical value is offset by lower amounts of error variance?