On the first day of trout season a team of biologists went with local trout anglers to the Macawber River. Each angler who caught at least 2 trout chose exactly 2 of these trout for the biologists to weigh. A total of 90 fish were weighed. The measurements show that at the beginning of this season the average trout in the Macawber River weighed approximately 1.6 kilograms.
Question: The reasoning above is most vulnerable to criticism on the grounds that it
Options:
A. makes a generalization from a sample that is unlikely to be representative
B. relies on evidence that is anecdotal rather than scientific
C. ignores the variations in weight that are likely to occur over the whole season
D. fails to take into account measurements from the same time in previous seasons
E. does not consider whether any fish other than trout were caught
Answer: A