Final answer:
Liquid templating language can indeed be used in email notifications sent via Shopify Admin, to customize emails and include dynamic content based on specific details of the customer's order.
Step-by-step explanation:
The question pertains to whether Liquid templating language can be used in email notifications sent through the Shopify Admin. The answer is A. true. Shopify utilizes Liquid, an open-source template language created by Shopify itself, as a basis for merchants to customize the look and content of their emails, websites, and other customer-facing templates. Within the Shopify Admin, one can customize email notifications by editing the Liquid code to include dynamic content that can change based on the recipient's information or the details of their order.