Final answer:
Carl Rogers did not specifically attribute loneliness to external social forces, focusing instead on the internal experiences and self-concept of individuals.
Step-by-step explanation:
Regarding the statement that Carl Rogers believed that loneliness was due to external social forces, the answer is B) False. Carl Rogers, a humanistic psychologist, emphasized the internal experiences and the importance of the self-concept. He postulated that incongruence between one's self-concept and experiences leads to psychological distress, but he did not specifically attribute loneliness to external social forces. Instead, he focused on the individual's internal sense of self-worth and the alignment between the real self and the ideal self to explain well-being or discomfort.