Although psychology contains diverse subfields and approaches, two factors provide unity. One of these factors is that
a.psychologists' interests, activities and values are not unified.
b.psychologists in every subfield draw on and contribute to knowledge from other subfields.
c.every psychologist performs research in many subfields of psychology.
d.psychologists use speculative methods instead of empirical methods.
B. psychologists in every subfield draw on and contribute to knowledge from other subfields.