请问A和B分别错在哪里？谢谢

问题如下：

The consensus protocol on a distributed ledger technology network refers to:

选项：

A.the standardized approach that governs how digital assets generated from a blockchain network should be valued. B.programs embedded in electronic transaction records that are coded to self-execute according to predetermined conditions. C.the set of rules governing how blocks are cryptographically linked to the chain to become immutable on the distributed ledger network.

解释：

When transactions enter a node of the distributed ledger, they are bundled into “blocks” and cryptographically “chained” together to facilitate verification of the prior history. How blocks are chained together is determined by the consensus protocol, a set of rules governing how blocks can join the chain and become the immutable “truth.” The consensus protocols are designed to resist attempts at malicious manipulation up to a certain level of security.

共识机制就是一系列的规则，这个规则规定了如何把一个新的记录计入到账本上并生效，所以C正确。