Passage Summary: Someone claims saving oiled otters is a waste of time because most of the ones found died, and many more likely died without being counted.

Conclusion: The effort to rehabilitate sea otters after the oil spill was not worthwhile.

Reasoning: Only a small percentage of the total affected otters survived, and the actual survival rate is likely even lower because many dead otters were never found.

Analysis: The author concludes the effort wasn't 'worthwhile' based solely on a low survival percentage. However, 'worthwhile' is a subjective term that might depend on more than just a success rate; perhaps those 222 otters were essential for the species' survival. To challenge the evidence, we should look for an answer that suggests the data provided is incomplete or that the survival of those specific otters carries more weight than the author admits.