Which of the following statements explains why many 19th century Utopian societies tended to fail?

19th century Utopian societies tended to fail because:

(A) Leaders became corrupt and betrayed the original vision.

(B) Members had unrealistic expectations and were not prepared for the challenges of living in a commune.

(C) Utopian societies could not sustain themselves economically and were dependent on outside support.

(D) All of the above.