When a grocery store chain adopts a new practice of its competitors by staying open 24 hours a day, requiring employees to work flexible schedules, it is implementing a(n) change.

innovative change

Explanation:

It is important to continually enhance to succeed and to compete in the market. Development is strongly linked in with improving things, making the operations quicker, or less expensive than your competitors. Companies need to move toward development and change viably and proactively. In that regard, the above scenario is an example of innovative change brought up to take a competitive advantage over others.

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