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The correct answer is A.

OBJ-3.3: The mean time between failures (MTBF) measures the average time between when failures occur on a device. The mean time to repair (MTTR) measures the average time it takes to repair a network device when it breaks. The recovery time objective (RTO) is the duration of time and a service level within which a business process must be restored after a disaster to avoid unacceptable consequences associated with a break in continuity. The recovery point objective (RPO) is the interval of time that might pass during a disruption before the quantity of data lost during that period exceeds the Business Continuity Plan’s maximum allowable threshold or tolerance.

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