Why would plebeians being elected as consul be good for the common people?

Explanation:

It was good because the rights of common people are protected and defended by the plebeians. The people felt safe because they have representatives to fight, to protect their rights as citizens. It was a great chance of not being isolated and marginalized.

They had a voice, the voice of the plebeians, they are treated fairly and justice for any matter. The election of plebeians it was a small step of democracy.

d.prevent the spread of communism outside of eastern europe.

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.