Question

question 7 of 10
dylan is having a hard time understanding how something that is decentralized with no authority overseeing everything can be safe and secure. what detail will help ease his mind?
blockchain is a public ledger in which all transactions can be seen and double - checked.
hes wrong, central banks in each country actually oversee transactions on blockchain.
since it is decentralized everyone is free to secure their own data.
blockchain technology is shared on one block of data that is encrypted.

Explanation:

Blockchain is a decentralized public ledger. All transactions are visible and can be double - checked by participants. This transparency and the fact that it's not controlled by a single authority (contrary to the option about central banks) and the encryption aspect (but the key is the public ledger nature for security perception here) make it secure. The option about everyone securing their own data is too vague compared to the public ledger explanation.

Answer:

Blockchain is a public ledger in which all transactions can be seen and double - checked.