What Does the Labour Supply Curve Reflect

Multiple Choice

What does the labour supply curve reflect

A) the labour-leisure tradeoff and how workers' respond to a change in the wage
B) the opportunity cost of labour and how workers' respond to a change in the quantity of labour supplied
C) the labour-leisure tradeoff and how workers' respond to the quantity of labour demanded
D) the quantity of labour firms' hire in response to changes in profitability