This depends on the system, the kind of information they need, etc...
In the most democratic countries, government sites might prove most reliable. In other, independent journalists might be better. In a way, it's almost impossible to be sure your information isn't biased.... the best is if you know who wrote it and what their agenda is: if they news is left-wing and what they report is not very left-wing, then it's perhaps reliable.
Ambulances, new techniques, and more advanced care fro wounded soldiers.
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Generally speaking, World War II created "<span>c. a combination of prosperity and scarcity" on the homefront, since it boosted employment and GDP but there was still war rationing. </span>
A compound is an object made when two or more elements are chemically joined. Water and salt are examples of these compounds. When the elements are combined, the atoms lose their own properties and have different features from the elements they are made of. I hope this help at all...