During world war i, which federal mobilization agency introduced daylight savings time and shortened the work week for some factories?

I think you forgot to give the options for this question. I am answering the question based on my research and knowledge. "The Fuel Administration Agency" was the federal mobilization agency that introduced daylight savings time and shortened the work week for some factories during World War I. 

the following best describes postwar era writers in their works:

progressive

many writers,authors,novelists,poets concentrated more on social art and social writing and stayed away from political writings.

Your answer will be a.