By sending billing address signals along with the payment information to Radar, the estimated fraud model improvement is

• A. 1%
• B. 0%
• C. 5%
• D. 10%

Answer: (A)

Adding billing address signals to Radar uses an extra data cue to help differentiate legitimate transactions from fraudulent ones. Because Radar already relies on many signals, the gain from one additional signal tends to be modest. The estimated improvement is about one percent, reflecting a small but meaningful lift in the model’s ability to detect fraud without harming legitimate payments. A larger jump, like five or ten percent, would imply a much bigger impact than a single extra signal typically provides, while zero improvement would ignore the potential usefulness of any new data.