Answer:
Hello. By reading the sentence presented in the question above, we can see that this sentence is a quote from the text "Birth of the Cool" written by Katy Kelly. In this case, the author supports this statement by presenting the various methods used to keep the food fresh.
Step-by-step explanation:
"Birth of the Cool" is a text that shows how the creation of refrigerators made life easier for people, since it was very difficult to keep food refrigerated and preserved before refrigerators existed. The wait for the creation of refrigerators was very long and people had to develop several techniques and methods to keep food preserved, especially in the summer. These methods were what the author used to justify the phrase "gracious living had been a long time coming," showing that the easy life that refrigerators promote, was not something easy to achieve.