Assume that at the certain glass factory, the number of flaws in plate glass windows is monitored over time. What kind of control should be employed to monitor this process?
A. X (X has a bar on it) chart
B. R chart
C. p chart
D. c chart
E. Both (a) and (b)
F. Both (c) and (d)
G. All charts (a)-(d) should be used