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An important consideration in the analysis of financial variables using Ordinary Least Squares (OLS) estimation is the potential for bias if a key variable is omitted. Specifically, when analyzing a financial variable's behavior, at what point does the bias arise due to the exclusion of an important variable in the OLS model?
A
Omitted variable bias occurs when the omitted variable is correlated with an included regressor and is a determinant of the dependent variable.
B
Omitted variable bias occurs when the omitted variable is correlated with an included regressor but is not a determinant of the dependent variable.
C
Omitted variable bias occurs when the omitted variable is independent of an included regressor and is a determinant of the dependent variable.
D
Omitted variable bias occurs when the omitted variable is independent of an included regressor but is not a determinant of the dependent variable.