Question

astronauts must eat the fresh foods right away. the iss has no refrigerators for food. then astronauts return to a diet of freeze - dried packaged foods—plus some veggies grown on board. why do astronauts return to a diet of packaged foods? astronauts cant equally share fresh foods. packaged foods contain vitamins. packaged foods are easy to prepare. astronauts cant safely store fresh foods.

Explanation:

The text mentions that the ISS has no refrigerators for food, so fresh foods cannot be safely stored. This is why astronauts return to a diet of packaged (freeze - dried) foods.

Answer:

D. Astronauts can't safely store fresh foods.