Correct Answer: Demur

Solution : The third option is the correct choice.

Given the context of the sentence, where there was a general hesitation to ignore the problem, demur fits well. It implies expressing reluctance or hesitation, capturing the idea that people were hesitant to ignore the problem.

The meanings of the other options are as follows:

• Disposition is a person's inherent quality of mind and character.
• Deride means to mock or ridicule.
• Denigrate means to criticise unfairly or defame.

Therefore, the complete sentence should be: "There was a general hesitation and demur to ignore the problem."