Final answer:
The consultant should propose option C) Configure a relational data structure using Data Extensions and leverage a SmartCapture form that is hosted in Landing Pages. This solution allows the customer to integrate their website with Marketing Cloud and use tools like Journey Builder in the future.
Step-by-step explanation:
Given the customer's requirements and available resources, the consultant should propose option C) Configure a relational data structure using Data Extensions and leverage a SmartCapture form that is hosted in Landing Pages. This option allows the customer to integrate their website with Marketing Cloud and also provides the opportunity to use tools like Journey Builder in the future.
Data Extensions provide a flexible way to store and manage customer data, while SmartCapture forms hosted in Landing Pages allow users to update their marketing communication preferences. By choosing this option, the customer can fully leverage the capabilities of Marketing Cloud and have control over the development and hosting of the form on their website.
With this solution, the customer's in-house web development resources can handle the API integration with their website, ensuring a seamless integration with Marketing Cloud.