What is the most efficient way for the Salesforce Admin to hide the custom fields from customers?

Northern Trail Outfitters has a Customer Community for viewing discussions and Knowledge articles. The Customer Support team needs to add custom fields on articles for internal comments and additional references .

What is the most efficient way for the Salesforce Admin to hide the custom fields from customers? Choose one answer
A . Create separate articles without these custom fields for the Customer channel and include in the Community
B . Update the customer profile by removing access to these custom fields on all article types
C . Override the article detail page with a custom Visualforce page and hide these custom fields for customers
D . Modify the article detail page with custom Lightning Components that hide these custom fields

Answer: B