In blockchains, which statement is true?

All the statements provided in the options accurately describe key characteristics of blockchains, particularly in the context of cryptocurrencies like Bitcoin.

When considering the first statement, it's important to note that blockchain technology is designed to be immutable, meaning that once data is recorded in a block, it cannot be altered or deleted. Any new transactions or changes are only reflected by adding new blocks to the chain, ensuring that the historical integrity of the data remains intact.

The second statement emphasizes the chronological nature of blockchain transactions. Blockchains work by adding new transactions in a sequential order, allowing anyone to trace the history of transactions without any possibility of reverting or erasing the previous ones. This creates a transparent and verifiable ledger that contributes to the trustworthiness of the system.

Lastly, the concept of Bitcoin's blockchain as a "Distributed Ledger" is central to how blockchain technology functions. The data stored on Bitcoin's blockchain is replicated across a network of computers (nodes) around the world, which enhances security and resilience against failures or attacks on a single point. This distributed nature ensures that all participants in the network have a copy of the ledger, which helps maintain consensus among participants regarding the state of the blockchain.

Since each individual statement conveys a fundamental aspect of blockchain technology, the comprehensive nature