Fact 1: Irradiating food can be used to kill existing microorganisms in the food. Fact 2: Food irradiation is one tool for improving food safety by killing pathogenic microorganisms. Given the two facts above, answer the question "What does irradiating food do?" with the following options: - Relieve pain - enhance food's nutrients - improves food safety - allows growth of bacteria - increases food waste - chemical changes - get chemical reactions started - major threat to health
A:
improves food safety