a market economy is regulated by the interactions between which two things?
a.
goods and services
b.
producers and consumers
c.
product-based and service-based businesses
d.
public and private sectors

Option B

Explanation:

The market economy is regulated by the interaction between producers and consumers.

The producers defines the production area that makes the products which is used by the consumers. The raw materials is converted into useful products.

The consumer are buyers of the products made by the producers. They purchase the products and the producers gain profit by this.

There is a balance in the market by the interaction between the producers and consumers.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge