What must an employer ensure regarding the accessibility of SDSs?

The requirement for employers to ensure that Safety Data Sheets (SDSs) are readily accessible during work shifts is crucial for maintaining workplace safety. This accessibility allows employees to quickly obtain important information regarding the hazardous chemicals they may encounter while working. The immediate access to SDSs enables workers to understand the risks associated with these substances, including handling procedures, protective measures, first-aid instructions, and emergency response information.

Accessibility during work shifts means that SDSs should be available in a way that does not impede the employees' ability to get the information they need when they need it. This could be in physical format in various locations throughout the workplace or in a digital format that is easily accessible on-site. It ensures that in the event of a chemical spill or exposure, employees can swiftly refer to the SDS to take appropriate action or seek medical help.

Options such as storing SDSs only in the main office or filing them in a safety cabinet do not ensure immediate availability during work shifts and could delay emergency response. Limiting the format to only digital options could also hinder accessibility for those without immediate access to electronic devices in certain areas where chemicals are handled. Thus, B is the correct answer as it emphasizes the importance of ready access to critical safety information during working hours.