Data Retention Is One of the Characteristics of Good Data

Multiple Choice

Data retention is one of the characteristics of good data. Choose from the list below how blockchain systems impact data retention.

A) Data is immutable once entered into a blockchain ledger and cannot be changed or deleted.
B) Each node can potentially back up the entire blockchain ledger to provide multiple copies.
C) Miners verify validation of transactions by a majority consensus prior to entry.
D) A blockchain is widely distributed.