Which of the following best defines competitive inertia?

It is a corporate$-$level strategy that minimizes risk by diversifying investment among various businesses or product lines.

It is a discrepancy between a company's intended strategy and the strategic actions managers take when implementing that strategy.

It is a risk$-$seeking strategy that aims to create and acquire companies in completely unrelated businesses.

It is a reluctance to change strategies or competitive practices that have been successful in the past.