Which of the following slogans best exemplifies wallerstein's theory of systems?

a.
the rich get richer while the poor get poorer.
b.
if you work hard enough, you can achieve anything.
c.
everything in the world balances out.
d.
money and power are not related.

A. The rich get richer while the poor get poorer.

Wallerstein's theory of systems is a way to understand economic and power relations among countries. The theory states that countries can be divided in core, periphery and semi-periphery. Core countries concentrate on producing high-skilled professionals with capital-intensive production, while periphery countries produce raw materials, mainly with low-skill, labor-intensive production. This pattern causes money to flow to the core, which in turn increases the capital these countries have available for capital-intensive production, reinforcing their position as core.