The Rust Belt faced productivity challenges after the $1960$s$,$ including the loss of competitive advantage in the U$.$S$.$ automotive industry compared to the global market. Which of the following is NOT a lesson learned from Detroit's experience?

Group of answer choices

The successful transformation of the traditional automotive industry into the financial hub of the mid$-$west.

A sharp population decline as residents sought employment opportunities elsewhere.

Significant fiscal challenges despite Detroit's efforts to increase taxes and generate revenue.