没太看懂（凑字数凑字数凑字数

问题如下：

Which of the following is not a potential benefit of distributed ledger technology?

选项：

A.

Facilitation of smart contracts

B.

Energy-efficient way of record keeping

C.

Immutable and secure transaction records

解释：

The correct answer is B. Distributed ledger technology provides greater accuracy, transparency, and security in record keeping; enables faster transfer of ownership; and enables peer-to-peer interactions. A DLT network relies on certain consensus mechanisms in which all nodes that are connected on the network agree on new transactions and ledger updates. Once verified by all the nodes of the network, the transaction ledger is immutable and is kept by each of the nodes. However, the transaction validation process requires material computational power of all the miners on the network, especially in the case of proof-of-work consensus protocol.