Dear teachers!
- These suggestions are _____________ to be accepted by the majority of members
A- impossible
B- unlikely
Best regards!
B
People are unlikely to accept these suggestions.
It is unlikely that people will accept ...
It is impossible (for people) to accept ...
These suggestions are impossible/not possible (for people) to accept.
The first three of those are fine; the fourth is, in my opinion, possible. Yours is not.