15. What should be done to help keep frozen food safe in a freezer? a. Open it frequently to check the temperature. b. Defrost the freezer on a regular basis. c. Install a thermometer in the coldest part of the freezer. d. Ensure the temperature stays at 41^circ F(5^circ C)

## Step 1<br />The question is asking for the best method to keep frozen food safe in a freezer. The options provided are:<br />a. Open it frequently to check the temperature.<br />b. Defrost the freezer on a regular basis.<br />c. Install a thermometer in the coldest part of the freezer.<br />d. Ensure the temperature stays at \(41^{\circ }F(5^{\circ }C)\).<br /><br />## Step 2<br />We need to evaluate each option based on its effectiveness in maintaining the safety of frozen food.<br /><br />## Step 3<br />Option a suggests opening the freezer frequently to check the temperature. However, frequent opening of the freezer can lead to temperature fluctuations, which can compromise the safety of the food.<br /><br />## Step 4<br />Option b suggests defrosting the freezer on a regular basis. However, regular defrosting can also lead to temperature fluctuations and potential contamination.<br /><br />## Step 5<br />Option c suggests installing a thermometer in the coldest part of the freezer. This is a good method as it allows for constant monitoring of the temperature, ensuring that it stays within the safe range.<br /><br />## Step 6<br />Option d suggests ensuring the temperature stays at \(41^{\circ }F(5^{\circ }C)\). However, this temperature is too high for a freezer. The safe temperature for a freezer is 0°F (-18°C) or lower.