I have realised I am weak in assumption qs
But let me use the techniques I know - please lmk if I am wrong.
Answer- option A
Justification:
Conclusion- cold temp increases the chances of sickness in bunnies.
Why?- based on the 2 experiments where all was same except temperature.
Assumption: should validate the conclusion very strongly
Options B,C,D is ruled out.
Between A and E.
E- slight temp variances induces illness, but the conclusion is CLEARLY talking cold temp
hence ruled out
Left with only A