A research study was conducted to evaluate the effects of therapy (Factor A) and medication (Factor B) on depression. Results indicate that the therapy was effective at reducing depression levels but that the medication was not effective at reducing depression levels. The data was analyzed using a Two-Factor analysis of variance. Which of the following is an accurate description of the results? There is a significant main effect for Factor A but no main effect for Factor B There is a significant main effect for both Factor A and Factor B. There is a significant interaction between Factor A and factor B. There is no main effect for Factor A but there is a significant main effect for Factor B