Answer:
C. LABOUR MARKET - HOUSEHOLDS EARN WAGES BY SUPPLYING LABOUR DEMANDED BY FIRMS
Explanation:
Circular flow of income (2 sector) involves REAL Flow and MONEY Flow exchange between households and Firms
* Households provide firms with Factors of Production (FOP) - Land , LABOUR , Capital , Entrepreneur [REAL FLOW]
for Returns to FOP - Rent , WAGES , Interest , Profit [MONEY FLOW]
* Firms provide goods and services to households [REAL FLOW]
for Prices from households to firms [MONEY FLOW]