Which Design of Experiments Principle Is Used to Remove Systematic

Multiple Choice

Which design of experiments principle is used to remove systematic error?

A) Replication, in which the number of tests should equal the number of replications.
B) Efficiency, which is the lowest possible variance from any estimator divided by the expected variance of the selected estimator.
C) Balance, which is evenly distributing both the quantity and variety of work across available work time, avoiding overburden and underuse of resources.
D) The power of a hypothesis test to measure of the probability of rejecting the null hypothesis when it is false.