Iz Which detail from the section "Back Up: What's Blockchain?" BEST explains why blockchains keep NFTs safe from hackers?
(A)
(B)
A blockchain is like a digital database that operates in a ledger format
. Ledgers are often chronological
lists of purchases and deposits. It shows what is added to or taken out of an account.
Bank accounts are organized as a type of ledger, which also records who bought what, where, and
when. A blockchain tracks transactions of items or assets, buying or selling something valuable, such as
bitcoin or NFTs. Bitcoin is a type of digital money.
When you are buying or selling something with a credit card, all the transactions are handled by
computers. These are, however, usually in a central location controlled by a company like Visa or a
bank.
(D)
With blockchain, your purchases and sales are completed through a peer-to-peer network of computers
owned by people just like you. This means thousands of private computers scattered around the country
are powering transactions.