Which was a true statement about how world war 1 affected working conditions in the united states

The statement is ( A) the federal government agreed to support labor unions in return there will be no strike from unions.

Explanation:

During the World War 1 many labor unions as well as many worker organisation played a vital role during the boom period. The federal government made a agreement with the trade unions that they will support the labor unions and in return the labor unions will not do any strike. If strike is done there will be decrease in production of good and hence this will have an adverse affect on the war . So the labor unions should continue to work so that the production is done and which will be helpful during the war.