An organisational psychologist used an inventory to measure motivation (a numeric variable) with the purpose of investigating the effect of motivation on work performance (also a numeric variable). The participants of this study were 200 factory workers, who work in 10 different companies. Which of the following methodologies is more appropriate?

a.Exploratory factor analysis.

b.Confirmatory factor analysis.

c.Bayesian t test.

d.Multilevel modelling.