Which one of the following statements about Sangam literature in ancient South India is correct?

Let's analyze the statements about Sangam literature: A) Sangam poems are not devoid of references to material culture. They vividly describe various aspects of material life, including trade, agriculture, warfare, different types of towns and cities, arts, and crafts of the period. B) The social classification of Varna (Brahmana, Kshatriya, Vaishya, Shudra) was indeed known to Sangam poets and is reflected in the literature, although the social structure in Sangam age South India was distinct and not as rigid as in the North. References to various social groups and their occupations, which align with varna-like divisions, can be found. Therefore, this statement is correct. C) Sangam poems have extensive references to warrior ethic. War, heroism, and the valor of warriors are central themes in many Sangam texts, particularly the 'Purananuru' poems. The literature glorifies kings, chieftains, and their martial prowess. D) Sangam literature does not necessarily refer to magical forces as irrational. Instead, it often incorporates elements of folk beliefs, rituals, and supernatural phenomena, which were integral to the worldview of the time and not always dismissed as irrational. Thus, statement B correctly describes a characteristic of Sangam literature.