It Was _____ Who Said, "My Own Belief Is That

It was _____ who said, "My own belief is that man has the capacity as well as the desire to develop his potentialities and become a decent human being, and that these deteriorate if his relationship to others and hence to himself is, and continues to be, disturbed."

A) Alfred Adler
B) Carl Jung
C) Karen Horney
D) Isabel Briggs Myers