This question examines the purpose behind the creation of cunning tools as mentioned in the passage. The correct answer is 'B. To cope with work that is dangerous, boring, burdensome, or nasty' because the passage explicitly states this as the reason for devising such tools. Option A is incorrect because the passage indicates that tools are devised to cope with dangerous work, not to make it more dangerous. Option C is incorrect because the passage does not suggest that the tools were created to increase the number of tasks requiring human labor. Option D is incorrect because the passage implies that the tools were created to improve work efficiency, not to decrease it.