Which four main areas are covered by Subpart K of the OSHA standards?

The correct choice highlights the four main areas covered by Subpart K of the OSHA standards, which specifically addresses the standards for electrical safety in the construction industry. The designation of "Installation Safety Requirements" focuses on the protocols and standards necessary for safely installing electrical systems and ensuring that they comply with established safety regulations. "Work Practices" emphasizes the procedures and behaviors that workers must adhere to during their job responsibilities to maintain a safe working environment. The term "Maintenance and Environmental" refers to the ongoing upkeep of electrical systems and the need to consider environmental factors that could impact safety. Finally, "Special Equipment" pertains to any specific machinery or tools that may require additional attention under safety regulations.

The other choices do not align as closely with the specific focus of Subpart K, making option B the most accurate representation of the areas covered under OSHA’s electrical safety standards in the construction context.