My choice is A as well.
B - Not relevant
C - Not relevant
D - relevant but not needed
E - talking about the rest 3% which is not our concern as per the context.
I do not think E talks about remaining 3%.
Lets us consider the following
Total number of targeted people for poll = 1000
Let us say that only 100 responded
80 - oposed the relaxation
17 - supported the relaxation
3 - we do not know they may have expressed no opinion. (but they responded)
Now, can we make any conclusion on th basis of this statistics? 90% of the targeted people did not respond. If all of them respond, the statistics can very significantly.
So don't you think that the information mentioned in E is required to evalute the claim?