Question

a visual indicator that food has been thawed and refrozen is: large ice crystals dried out food discoloured food all of the above

Explanation:

When food is thawed and refrozen, water within the food forms large ice crystals during the refreezing process. This can cause the food to become dried out (due to moisture loss and structural damage from ice crystals) and discoloured (as chemical and physical changes occur). So all the listed visual indicators can be present.

Answer:

all of the above