Final answer:
Microeconomic Theories (B) are the theories that mainly focus on micro level issues, examining the smaller scale parts of the economy such as individuals, firms, and industries.
Step-by-step explanation:
The theories that focus primarily on micro-level issues are B) Microeconomic Theories. Microeconomic theories examine parts of the economy at a smaller scale, such as individuals, firms, and industries. They consider how these entities interact and make decisions, which in turn affects the supply and demand of goods and services, pricing, and the allocation of resources. In contrast, macroeconomic theories look at the economy as a whole and address large-scale concerns such as national productivity, inflation, and unemployment. By analyzing microeconomic theories, one gains insight into the intricate workings of the economy at a detailed level. These specifics can include consumer behavior, firm production processes, and market mechanisms that influence economic outcomes.