When Analyzing a Blood Gas Control Sample, You Notice That

Multiple Choice

When analyzing a blood gas control sample, you notice that the result falls outside the 2 SD range. How could you verify that this was a random error (error of imprecision) ?
I.Repeat the analysis on a different analyzer.
II.Compare the control to an actual patient sample.
III.Rerun the control sample a second time.

A) I and II
B) I and III
C) II and III
D) I, II, and III