Final answer:
The economist viewed the growing middle class and shrinking proletariat as positive signs of a maturing economy and emphasized the need to reduce dependence on fossil fuels.
Step-by-step explanation:
The economist claimed that the shrinking proletariat and growing middle class were auspicious signs that the nation's economy was maturing properly. Thus, the correct answer to the question is 1) The nation's economy is maturing properly and the growing middle class is a positive sign. Furthermore, the economist insisted that the nation needed to break its tenacious dependence on fossil fuels and transition towards developing new forms of technology, which indicates an awareness of the importance of sustainable energy sources and innovation for continued economic growth.