Why was the push for chief mine inspectors to have eight years of experience a positive change to labor laws? I. It created a safer work environment. II. It reduced accidents and deaths. III. It allowed for more hiring of laborers.

Requiring chief mine inspectors to have eight years of experience meant inspections could be carried out by people with substantial knowledge of mining hazards. Better-informed inspections could help create safer working conditions and prevent accidents and deaths, so statements I and II are correct. The experience requirement did not directly allow more laborers to be hired, so statement III is not supported. The best answer is D, I and II only.

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