What is the purpose of the Levey-Jennings chart?

The Levey-Jennings chart is used to monitor the reliability of a test.
The Levey-Jennings chart is used to compare the results of different laboratories.
The Levey-Jennings chart is used to evaluate the accuracy of a test.
a) I and II are correct.
b) I and III are correct.
c) II and III are correct.
d) Only I is correct.
e) Only II is correct.
f) Only III is correct.