Arrange the following in descending order (backward) starting from the recent period:A. Increase in the use of iron, cities, punch market coins.B. Beginning of the use of iron in the subcontinent.C. Settlement in Arikamedu portD. Beginning of the composition of Sangam literature

• A. C, D, A, B
• B. C, D, B, A
• C. A, C, B, D
• D. A, B, C, D