The most effective and intended method to filter the Program Performance Report by a program-level attribute, such as geographic region, is by using Program Tags. Tags are metadata specifically designed to categorize and organize Marketo assets. By creating a "Region" tag type and applying the appropriate tag value (e.g., "EMEA," "NA") to each program, the marketer can then use the "Program Tag" filter on the report's Setup tab. This precisely configures the report to include only the programs that match the specified geographic region, directly fulfilling the requirement.

A. Custom columns are used to add data fields to the report's output for viewing; they do not filter which programs are included in the report's scope.

C. The smart list within the report setup filters the people whose activities are counted in the report's metrics, not the programs themselves.

D. The drill-down feature is used for exploring data within an already generated report; it is not a tool for setting the initial scope or filtering criteria.

---

1. Adobe Marketo Engage Documentation, "Program Performance Report." This document details the report's configuration. Under the "Setup Tab" section, it explicitly lists "Program Tag" as a primary filter to "select the program tag(s) you want to report on." This directly supports using tags as the filtering mechanism.

2. Adobe Marketo Engage Documentation, "Program Tags Overview." This guide states, "Tags are a great way to add metadata to your programs for filtering and reporting purposes." This confirms that using tags for reporting is a best practice and the feature's intended function.

3. Adobe Marketo Engage Documentation, "Create a Program Tag." This article explains the process of creating tag types and values. It notes that once created and applied, these tags become available in report filters, reinforcing that this is the correct procedure for achieving the user's goal.