How did henry ford contribute to changes in transportation in the early 20th century? a. ford perfected the interchangeable tire, making road travel easier. b. ford invented the first car and it quickly became the number one choice for transportation. c. ford invented the electric motor, thus allowing cars to travel over longer distances across counrty. d. ford perfected the assembly line, driving the cost of cars down, thus making them affordable to most people.

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.