Adobe Real-Time CDP's Segment Builder is the designated tool for creating audiences based on specific behavioral criteria. To target repeat customers, a marketer can define rules that filter for profiles based on the number of visit events (frequency) within a specific timeframe (recency). This approach directly leverages the time-series event data stored in the Experience Data Model (XDM) to create a precise, rule-based audience that meets the campaign's requirements without needing to compose multiple pre-existing audiences or import lists.

A. Audience Composition is for combining existing audiences, not for creating a new one from scratch based on specific event rules like frequency and recency.

C. While CRM data can be used, the core requirement is to build rules based on visit frequency and recency, which is a function of the rule builder, not composition.

D. Importing an audience from Adobe Target is a valid workflow, but it does not involve building the audience within Real-Time CDP using its native rule-building capabilities.

1. Adobe Experience Platform. (n.d.). Segmentation Service overview. Adobe Experience League. Retrieved from https://experienceleague.adobe.com/docs/experience-platform/segmentation/home.html. (This document outlines the purpose of the Segmentation Service in creating audiences from customer data.)

2. Adobe Experience Platform. (n.d.). Segment Builder user guide. Adobe Experience League. Retrieved from https://experienceleague.adobe.com/docs/experience-platform/segmentation/ui/segment-builder.html. (See the section "Building segment definitions," which details how to add rules based on events and attributes, including temporal constraints for recency.)