You Should Use a Correlated Samples T Test When

You should use a correlated samples t test when

A) you have a three-group design, you randomly assigned your participants, and your DV is measured on an interval or ratio scale of measurement.
B) you have a two-group design, you used matched pairs, and your DV is measured on an interval or ratio scale of measurement.
C) you have a two-group design, you randomly assigned your participants, and your DV is measured on a nominal or ordinal scale of measurement.
D) you have a two-group design, you randomly assigned your participants, and your DV is measured on an interval or ratio scale of measurement.