Testing to see if there is evidence that the proportion of US citizens who can name the capital city of Canada is greater than 0.75. Use the following possible sample results:
Sample A: 31 successes out of 40
Sample B: 34 successes out of 40
Sample C: 27 successes out of 40
Sample D: 38 successes out of 40

A situation is described for a statistical test and some hypothetical sample results are given. In each case:
(a) State which of the possible sample results provides the most significant evidence for the claim.
(b) State which (if any) of the possible results provide no evidence for the claim.