Is it, in your opinion, possible       new measures will be taken to improve the terrible traffic?

Is it, in your opinion, possible        new measures will be taken to improve the terrible traffic?

A. whether        B. that          C. when        D. what

Is it, in your opinion, possible __________ new measures will be taken to improve the terrible traffic?

Is it, in your opinion, possible       new measures will be taken to improve the terrible traffic?

1. A.
   whether
2. B.
   that
3. C.
   when
4. D.
   what