a mind-boggling question

[curious]

Which do you think is correct?

I keep on asking you all to empty your bins and turn off all the lights before you leave, but ...........

a) you don't b) so are you c) he wasn't either d) everybody is too e) no one does so

Is it necessary for A to be "you don't do so" to be correct? The answer given is E.

[Tdol]

Not to me- A) is fine IMO.