The payment mechanism typical to e-business
(a) cash on delivery (CoD)
(c) credit and debit cards
The payment mechanism that is typical to e-business is e-cash. The other payment mechanisms mentioned—CoD, cheques, and credit or debit cards—are used for transactions in traditional modes of business as well as in e-business. However, e-cash payment can be made only in the case of online transactions and cannot be used in traditional modes of business.
Hence, the correct answer is option (d).