As many as 98, 000 people die each year due to medical error. In a campaign to reduce lethal errors, thousands of hospitals introduced six key changes, including rapid-response teams, re-checks of patient medication, and new guidelines for preventing infection. The campaign estimated that, over an 18-month period, more than 100, 000 lives were saved as a direct result of the program. Which of the following can be most properly inferred from the above statements? ['If the campaign had not been implemented, more than 100, 000 people might have died during the 18-month period due to medical error.', 'The key changes initiated by the campaign will continue to be implemented in the future.', 'In the future, no one will die because of medical error.', 'The campaign saved all of the people who otherwise would have died due to medical error in that time period.']