Which of the following is NOT a customization option for content cards?

The choice indicating offline accessibility is the correct answer because it is not a customization option for content cards in the Braze platform. Content cards are designed to be displayed with specific aesthetics and interactivity features, which can be tailored through options such as look and feel, interactive cards, and multiple feeds.

Look and feel allows developers to modify the design attributes of the cards, ensuring they align with the overall branding of the app. Interactive cards provide various engagement features like buttons or links for users to interact with the content. Multiple feeds enable the display of different sets of content based on specific criteria or user segmentation.

In contrast, offline accessibility is not inherently a feature tied to the customization of content cards. Content cards rely on an internet connection to retrieve and display the latest content from the Braze platform, so they do not function in offline mode. As a result, this differentiates it as not being a customization feature for content cards.