4. What is Bitcoin? A) A digital currency decentralized on blockchain technology B) A government-issued currency C) A type of credit card D) A store of value

## Step 1<br />Bitcoin is a type of digital currency that operates without a central bank or single administrator. This means it is not issued by any government, unlike traditional currencies such as the US Dollar or Euro.<br />## Step 2<br />Bitcoin transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain. This is a key characteristic of Bitcoin that sets it apart from other types of currencies.<br />## Step 3<br />Given the above information, we can conclude that Bitcoin is a digital currency that is decentralized on blockchain technology. This aligns with option A.