What does a ledger in blockchain do?AIdentification of an objectBIdentification of ownersCMapping between owner and objectDNone of the above

To understand the function of a ledger in a blockchain, let's break down the key concepts:

1. Definition of a Ledger: In the context of blockchain, a ledger is a compilation of all transactions that have ever taken place within that blockchain network. It is a decentralized, distributed database that records all transactions across multiple computers in a way that the registered transactions cannot be altered retroactively.

2. Function of a Ledger: The primary role of the ledger is to ensure the integrity and security of data by providing an immutable record of transactions and the relationships between the participants (owners) and the objects (assets) associated with those transactions.

Given these points, we can analyze the options:

• A. Identification of an object: This is not entirely accurate because the ledger does more than just identifying objects.
• B. Identification of owners: While the ledger does record ownership, it’s not the sole function.
• C. Mapping between owner and object: This is the most accurate description, as the ledger effectively maps (or records) the relationship between owners and the objects (assets) they own through transactions.
• D. None of the above: This option can be dismissed because option C is correct.

Final Answer

Therefore, the correct answer is C. Mapping between owner and object.