Factor Analysis Can Be Used in Which of the Following

Factor analysis can be used in which of the following circumstances?

A) to identify a new, smaller set of uncorrelated variables to replace the original set of correlated variables in subsequent multivariate analysis
B) to identify underlying dimensions, or factors, that explain the correlations among a set of variables
C) to identify a smaller set of salient variables from a larger set for use in subsequent multivariate analysis
D) All are correct circumstances.