There are two main factors that determine whether a quantitative model or qualitative model is a better choice. Which of the following is one of these factors?

Question $9$ options:

a$)$

the estimates of the demand for labour

b$)$

the complexity of balancing supply and demand forecasts

c$)$

the long$-$term environmental forecasts of labour

d$)$

the degree of uncertainty involved in the demand forecast