The U.S. government introduced rationing mostly in order to <span>make sure war industries had the resources they needed</span>. The answer to your question is A. I hope that this is the answer that you were looking for and it has helped you.
<span>Option B. The king demanded that the colonies swear allegiance to him as part of the actions taken by the first Continental Congress. This was an expression of the British against the organisms that formed this congress for differences of ideals and objectives.</span>
The situation that caused stress on public services offered in American cities during the late 19th century and early 20th century was: Migration from farms to cities.
Migration from farms to cities massively increased the number of population that should be eligible to obtain government benefits in that area destination. This lead to an increase of work load for government workers in that period and caused stress on public services offered by the cities.