Ahistorian is trying to understand the events that led up to the terrorist attacks on new york city's world trade center on september 11, 2001. to do this, the historian constructs a timeline showing the order in which each event happened. which of these skills is the historian using?

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.

sam houston basically made tx he fought for anrew lead troops in the battle of san jacinto and then became president and james polk