System reliability s increased by:

A.
A lower MTBF and a lower MTTR

B.
A higher MTBF and a lower MTTR

C.
A lower MTBF and a higher MTTR

D.
A higher MTBF and a higher MTTR

Explanation:
One prefers to have a higher MTBF and a lower MTTR.
“Each device has a mean time between failure (MTBF) and a mean time to repair (MTTR). The
MTBF estimate is used to determine the expected lifetime of a device or when an element within
that device is expected to give out. The MTTR value is used to estimate the time it will take to
repair the device and get it back into production.” Pg 267 Shon Harris: All-in-One CISSP
Certification