Long-established firms with successful track records probably have accumulated much ______.Multiple choice question.business know-howphysical capital

In this context, the most appropriate choice to fill in the blank is "business know-how."

Long-established firms with successful track records tend to possess substantial knowledge and experience in their industry, which is often referred to as business know-how. This includes insights regarding market trends, operational efficiencies, customer relations, and strategic planning that are accrued over time.

On the other hand, while "physical capital" (such as machinery, buildings, or equipment) is essential for business operations, the phrase specifically suggests a focus on the intangible assets that contribute to a firm's success, making "business know-how" the more fitting answer.