Which of the following would not have been possible before the start of the columbian exchange? a. a french farmer uses wheat and barley to make bread. b. a native american hunter uses a rifle to hunt buffalo. c. an aztec king orders his soldiers to attack a neighboring village. d. an african muslim trades salt and spices to european sailors.

B. A Native American hunter uses a rifle to hunt buffalo.

Explanation:

It is called Columbian Exchange to the process occurred between the XV and XVI centuries in which agricultural products and other foods of the New World (the American continent) in the Old World (Europe, Africa and Asia) and vice versa were made known. A broader definition also includes technological advances, demographics and even diseases. The term was coined by the American historian Alfred Crosby in 1972 in his book The Columbian Exchange.

health care plans in the united states having high costs because they are focusing on providing quality programs for different groups of individuals. the quality of the service is based on money flow received from the members. without this investment, couldn't be possible a constant scientific searching to prevent death and illness caused because of low levels of health investigation. currently, the complaints are not about the highest cost, but about the coverage and benefits to access the necessary health services required by the members.  

besides, if a global health system is established the quality levels will fall down because of the standardized of the health. the access to care will increase but the quality will be low because it depends on the money invested.

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