Failure In Time (FIT) is another way of reporting __________________?

Failure In Time (FIT) is another way of reporting __________________?

A. MTTR
B. MTTF
C. MTSF
D. MTBF

Explanation: FIT reports the number of expected failures per one billion hours of operation for a device. This term is used particularly by the semiconductor industry but is also used by component manufacturers.