Cyaniding

A.A process of case hardening
B.A process of annealing a ferrous alloy
C.A process of hardening and tempering
D.A process used on non-ferrous materials for improving surface quantities
E.A process of removing carbon from metals

Accuracy is

A.The repeatability of a measuring process
B.Error of judgment in recording an observation
C.The ability of an instrument to reproduce same reading under identical situations
D.Agreement of the result of a measurement with the true value of the measured quantity
E.None of the above