Which is correct and most complete?

a. Most software do not print out runs in randomized order.

b. If no factors have significant effects, main effects plots are rarely (if ever) useful.

c. Sometimes a response of interest can be an average of three individual responses.

d. The usage of all runs to make decisions about all factors cannot aid in reducing the effects of measurement errors on the analyses.

e. All of the above are correct.

f. All of the above are correct except

(a) and (e).