The entrepreneurs who developed coca-cola, delta airlines, and the home depot are all important because their companies provide

Major major corporations like these provide goods, services and economic growth.  So the entrepreneurs who founded the companies are important as people who started up economic engines that are successful in employing many people and providing desired goods and services to many people.  Their creative thinking and willingness to take risks paid off.  John Pemberton invented Coca-Cola.  B.R. Coad and C.E. Woolman founded Delta.  Arthur Blank and Bernie Marcus founded the Home Depot.

By the way, I'm wondering if you're working on homework for history of the state of Georgia, because all three of the companies named are companies headquartered in Atlanta, Georgia.  They now carry on their enterprises globally, but are home-grown products of Georgia entrepreneurship.

B,c and d are the answers