When using Track Changes, any lines to which changes have been, have a bar displayed to the left side of them

Which external processes and functions need to be identified and accounted for in the eventuality that the disaster recovery plan needs to be implemented?

A) Phone systems or broadband connections B) Police department C) Fire department D) All of the above

Give an example of a schedule of two transactions that preserves database consistency (the database satisfies its integrity constraints), but nevertheless yields a final database that does not reflect the effect of both transactions.

What will be an ideal response?