Workplace documents are those that discuss topics related to the daily operation of a company. These are usually written in order to guide, protect, and limit workers. These include regulatory documents, employment contracts and policy guides. In this case, all of the selected options are documents that contribute to regulating the behaviour of employees in a particular industry.
The correct answers are option 1) "safety guides", 4) "internal policies", 5) "safety manuals" and 6) "employees’ contracts". Workplace documents are elements that have useful information regarding the activities of a company or business society. These documents include safety guides, internal policies, safety manuals and employees contracts, because all these documents include information of the activities of a company or business society.