Final answer:
The Triangle Shirtwaist fire led to D. changes in local labor laws for women and children. This tragedy caused the death of 146 workers and brought extensive reform in workplace safety and labor laws.
Step-by-step explanation:
The investigation of the Triangle Shirtwaist fire resulted in D. changes in local labor laws for women and children. The fire, which occurred on March 25th, 1911, was one of the deadliest industrial disasters in the history of New York City and led to the death of 146 workers, most of whom were young immigrant women. The tragedy highlighted the unsafe working conditions and led to a public outcry for improved labor laws, including safer working conditions and better building codes. The aftermath of the fire saw significant labor reform and changes to workplace safety regulations, aimed at preventing such disasters from happening again.