Salesforce Exam PDII Topic 11 Question 68 Discussion

AW Computing (AWC) handles orders in Salesforce and stores its product inventory in a filed, inventory_c, on a custom object.

product_c. When an order for a product_c placed, the Inventory_c field is reduced by the quantity of the order using an Apex trigger.

AWC wants to real-time inventory reduction for a product to be sent to many of its external systems, including some future systems the company is currently planning.

What should a developer add to the code at the placeholder to meet these requirements?

A)

B)

C)

D)