B. Integrate with an enterprise resource planning (ERP) system.

Explanation:

To provide field engineers with real-time access to current inventory levels of products that customers have purchased while they are at customer sites, integrating with an enterprise resource planning (ERP) system would be the most suitable solution.

Here's why:

Integrate with an ERP System (Option B): An ERP system is a comprehensive software solution that manages various aspects of a business, including inventory management, sales, purchasing, and more. By integrating the ERP system with Salesforce, field engineers can access up-to-date inventory information from the ERP system directly within Salesforce. This integration ensures that the inventory levels presented to the field engineers are accurate and current. This can help field engineers make informed decisions while servicing customers.

Option A (Implement Field Service Lightning) is designed more for managing and optimizing field service operations, including scheduling, dispatching, and tracking of field service tasks. While it can indirectly assist field engineers, it might not directly address the requirement of accessing real-time inventory levels....

Ans: A.

FSL supports inventory management of products purchased. You don't need a third-party ERP system. Always go with out of box first.

https://help.salesforce.com/s/articleView?id=sf.fs_set_up_parts.htm&type=5

A
FSL is used by Field engineers at customer sites. They can remotely query customer Assets.