Final answer:
President Nixon signed the Occupational Safety and Health Act (OSHA) on December 29, 1970, which focused on ensuring safe work conditions and is part of his larger environmental and public health policy efforts including the creation of the EPA and amendments to the Clean Air Act. Option C
Step-by-step explanation:
On December 29, 1970, President Nixon signed the Occupational Safety and Health Act (OSHA). This act was a significant piece of legislation aimed at assuring safe and healthful working conditions for working men and women by setting and enforcing standards, as well as providing training, outreach, education, and assistance.
The signing of this act reflects President Nixon's broader engagement with environmental and public health issues during his presidency, which also included the establishment of the Environmental Protection Agency (EPA) and the signing of the Clean Air Act amendments in the same year, which were instrumental in reducing air pollution.
President Nixon's administration also witnessed the signing of other influential environmental laws such as the National Environmental Policy Act of 1969, and later the Clean Water Act of 1972 and the Endangered Species Act of 1973. These command-and-control environmental regulations and their subsequent amendments have played a crucial role in improving America's air and water quality over recent decades. Option C