X-ray film may be damaged if stored near sources of _____, _____, _____, and _____?

X-ray film is sensitive to various environmental factors that can compromise its integrity and the quality of the images produced. When considering the storage conditions for X-ray film, the proper response identifies sources that can cause damage.

X-radiation is a known source of potential damage because exposure to radiation, even small amounts, can fog the film, leading to deteriorated image quality. Heat also poses a risk, as excessive temperature can affect the emulsions on the film, altering its ability to properly capture the X-ray patterns. Humidity is significant as well; high moisture levels can cause the film emulsion to swell or degrade, leading to potential loss of contrast and clarity in developed images. Lastly, chemical or gas fumes can contaminate the film, either through direct contact or vapor, leading to deterioration and potential changes in the film's sensitivity.

Thus, this option comprehensively lists the environmental factors detrimental to X-ray film storage, making it the most suitable choice. The combination of radiation exposure, elevated temperatures, excessive humidity, and chemical fumes encompasses the critical aspects necessary for preserving X-ray film integrity.