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Option a: Climate change has had negligible effects on the frequency of carnivore-human interactions in affected regions.
False version 1: Climate change has had no effect on the frequency of carnivore-human interactions in affected regions. - Inconsistent with the passage
False version 2: Climate change has had a lot of effect on the frequency of carnivore-human interactions in affected regions. - Consistent
As one of the versions contradicts the passage, we can say that the statement if false is inconsistent.
Option b: Predatory attacks by carnivores are a common occurrence and have steadily increased over the past few decades.
False Version: Predatory attacks by carnivores are a rare occurrence and have steadily increased over the past few decades.
This is consistent with the passage.
Option c: Carnivores lose their instinctive fear of humans, when consistently exposed to human food sources.
False Version: Carnivores do not lose their instinctive fear of humans, when consistently exposed to human food sources. -- irrelevant to the passage as the author speaks on reliance on human food and not exposure to human food "sources".
Option d: Human efforts to avoid risky behaviours around large carnivores have proven effective in reducing conflict incidents.
False version: Human efforts to avoid risky behaviours around large carnivores have not proven effective in reducing conflict incidents. -- beyond the scope of the passage.
Hence, option a is the correct answer.