You are developing a $2$k factorial experiment with $6$ factors, A$,$ B$,$ C$,$ D$,$ E$,$ and F$.$ The table shows the final design and the treatment combinations to be tested. You can assume that all factors have a high and low level.

Describe $($list$)$ the levels of each factor that will be tested for treatment combination $$abf$.$

Question $6$Select one:

a$.$

High A$,$ High B$,$ Low C$,$ Low D$,$ Low E$,$ High F

b$.$

Low A$,$ Low B$,($no C$,$ D$,$ E tested$),$ Low F

c$.$

High A$,$ High B$,($no C$,$ D$,$ E tested$),$ High F

d$.$

Cannot determine since information is missing for factors C$,$ D$,$ and E