A number of measures indicate the viability of a nation' s economy. The level and rate of growth of aggregate output are the most significant indicators, but unemployment and inflation rates are also important. Further, Switzerland, Austria, Israel, Ireland, Denmark, and Finland all have viable economics, but none has a very large population. Switzerland and Austria each have populations of about seven million; the other populations are at least one-fourth smaller. Which one of the following is most strongly supported by the information above? ["A nation's population is the most significant contributor to the level and rate of growth of aggregate output.", "A nation's population affects the level and rate of growth of aggregate output more than it affects unemployment and inflation rates.", 'Having a population larger than seven million ensures that a nation will be economically viable.', 'Economic viability does not require a population of at least seven million.']