Which of the Following Controls Most Likely Would Assure That

Which of the following controls most likely would assure that an organization can reconstruct its files?

A) Hardware controls that are built into the computer by the computer manufacturer.
B) Backup copies of data and program files that are stored away from originals.
C) Personnel, who are independent of data input, perform parallel simulations.
D) System flowcharts that provide accurate descriptions of input and output operations.