Final answer:
The best use of information technology for a regional drive-in restaurant chain to attract customers is a mobile app for ordering.
Step-by-step explanation:
The best use of information technology for a regional drive-in restaurant chain to attract customers would be mobile app for ordering. A mobile app would allow customers to easily browse the menu, place orders, and make payments from their smartphones, providing convenience and accessibility. This technology can help streamline the ordering process, improve customer experience, and potentially increase sales.
Social media marketing can also be beneficial for promoting the restaurant chain and engaging with customers, but it may not directly contribute to attracting customers to the drive-in locations. Virtual reality dining experiences and drone delivery services are innovative ideas, but they may not be practical or cost-effective for a regional drive-in restaurant chain.