Which Center Type is used to grant Customers access to "My Account"?

The correct answer is the Customer Center. The Customer Center in NetSuite is specifically designed for customers to manage their own accounts. It provides functionalities that allow customers to view their orders, invoices, and payment history, and also to update their account information. This access empowers customers to have greater control over their transactions and provides a self-service portal for them.

The Ecommerce Center, while related to customer engagement, is primarily aimed at online sales activities and does not specifically focus on granting account access like the Customer Center does. Therefore, while it may seem relevant, it is not the correct answer for providing customers access to "My Account." The other options, such as Sales Center and Accounting Center, serve different functions and do not cater to customer account management directly.