What is the first part of the temperature range in the TDZ where bacteria multiplies fastest?

The first part of the temperature range in the Temperature Danger Zone (TDZ), where bacteria multiply most rapidly, is indeed identified correctly as 70°F to 125°F. In this range, pathogens can grow exponentially due to optimal conditions created by a combination of temperature and moisture found in food.

Understanding the TDZ is crucial for food safety because it represents the temperature range where bacteria thrive. While some options provided might encompass parts of the TDZ, they either do not correctly identify the initial segment or mix temperatures that do not align with biological growth standards. The focus on 70°F to 125°F is particularly significant, as this is where most bacteria can double in number every 20 minutes, increasing the risk of foodborne illness. Therefore, proper food handling practices must ensure that foods remain outside this range to prevent contamination and growth of harmful microorganisms.