Sam Recently Learned About the Ohio State Studies in His

Sam recently learned about the Ohio State studies in his psychology class and is interested in conducting his own research on the topic of leadership behaviour.Which of the following statements offers Sam the best advice about pursuing research in this area?

A) No, don't pursue the research because the Ohio State studies collected enough data on leadership behaviours.
B) Yes, pursue the research because recent evidence shows methodological problems with the previous research.
C) No, don't pursue the research because the correlations between the two leadership dimensions are quite small.
D) Yes, pursue the research because contingency theories are necessary for advancing research in I/O psychology.