Which locations are known to have radiation present?

The presence of radiation in specific locations is closely linked to where radioactive materials or radiation-producing equipment are found. The CEBAF accelerator, LERF (Low Energy Recirculator Facility), test lab, and EEL (Experimental Equipment Lab) buildings all fall within defined areas that are intentionally used for research and experimentation involving radiation and radioactive substances. These facilities are designed to handle and contain radiation safely, which means they exist within environments where radiation levels are monitored, and safety protocols are stringent.

In contrast, locations such as office buildings, lunchrooms, storage areas, and break rooms typically do not house radiation sources or operate as environments where radiation exposure is a concern. While it's possible that some materials might emit low levels of radiation, in general, non-specialized areas like these are not classified as known locations with significant radiation presence. Therefore, option B is the most accurate choice when identifying locations typically recognized for having radiation present.