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According to SAMHSA (Substance Abuse and Mental Health Services Administration), about 50 million people in the United States experience symptoms of mental illness every year. Severe cases number more than ten million.
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Answer:
five contribuations is Papermaking, printing, gunpowder and the compass and "bo" also known as silk
1. gunpowder
2. bronze
3.printing also early chinese writing
4.compass and navigation
5. silk making
i ranked them from the top useful
Explanation:
The correct answer is letter B
Utility theory is widely used in economic science to explain how consumers or decision makers make their choices in the best way.
Even if it is not possible to measure the utility that a consumer attributes to a specific good, the theory seeks to compare and classify the alternatives of choice to the good.