You said "Which of the following" so do you mind providing the answer choices. ;)
Of the allies i would have to say the Americans because they invaded it no other soldiers then the Germans maybe a couple hundred soldiers from another country but last time I checked only America and Germany were fighting.
"<span>Early labor unions wanted pay similar to that of skilled workers" is the best option from the list, but a better response would be that they wanted protection from employer abuse. </span>