Which of the following statement's is/are correct:

A. According to the Hindu Marriage Act, performance of Sapatapadi before the sacred fire is obligatory for marriage

B. Chanting of mantra is not necessary while performing Saptapadi

C. Saptapadi was customary ritual, incorporated under the Hindu Marriage Act

D. In Hindu Marriage Kanyadana cannot be regarded essential.

Choose the correct answer from the options given below: