The correlation in a large company between self-confidence and income is 0.25. After controlling for level of authority on the job, the original correlation dips to 0.11. What is this evidence of?

Group of answer choices

A direct relationship between self-confidence and income

a spurious relationship between self-confidence and income; job authority causes both

an intervening relationship between self-confidence and income; self confidence affects income through increasing people's job auhority

either a spurious or an intevening relationship; it is impossible to differentiate the two possibilities on statisitcal grounds.