The Work of Donn Byrne and His Colleagues in the 1960s

The work of Donn Byrne and his colleagues in the 1960s on attitude similarity in liking is important in the history of relationship science because it demonstrated that:

A) relationships can be studied rigorously in the laboratory.
B) relationships cannot be studied through methodical procedures alone.
C) personal diaries are an important tool in relationship research.
D) personal diaries are misleading in relationship research.