Under the linear no-threshold model used in radiation protection risk assessment, which statement is true?

Under the linear no-threshold model used in radiation protection risk assessment, which statement is true?

• A. There is a fixed threshold below which there is no risk.
• B. Only high doses contribute to risk; low doses are negligible.
• C. Any non-zero dose carries some risk and risk increases linearly with dose.
• D. Risk rises nonlinearly with dose and has a plateau at high doses.

Answer: (C)