As a result of modern medicine, more people have been able to enjoy long and pain-free lives. But the resulting increase in life expectancy has contributed to a steady increase in the proportion of the population that is of advanced age. This population shift is creating potentially devastating financial problems for some social welfare programs. Which one of the following propositions is most precisely exemplified by the situation presented above? ['All social institutions are affected by a preoccupation with prolonging life.', 'Implementing technological innovations should be delayed until the resulting social changes can be managed.', 'Solving one set of problems can create a different set of problems.', 'Technical or scientific innovation cannot be the solution to all problems.']