Which is correct and most complete for t-testing or factor screening?

a. In general, adding more runs to the plan increases many types of error rates.

b. Type I errors in t-testing include the possibility of missing important factors.

c. Type II errors in t-testing focus on the possibility of missing important factors.

d. Standard t-testing can be used to prove the insignificance of factors.

e. All of the above are correct.

f. All of the above are correct except

(a) and (e).