Final answer:
To safely thaw food in a microwave, use the defrost setting with lower power to maintain temperatures that do not promote bacterial growth.
Step-by-step explanation:
The process that should be followed when using a microwave to thaw food is the defrost setting with a lower power, which is option c. This method helps keep the food at temperatures not conducive to bacterial growth. Using the microwave's defrost setting allows for even thawing and prevents the food from partially cooking during the thawing process. According to the US Department of Agriculture (USDA), other safe methods to thaw frozen foods include in the refrigerator and immersed in cold water, with the water being changed every 30 minutes. It is important not to thaw food at room temperature as this can activate microbes that were halted but not killed during the freezing process, presenting a food safety concern.