当部分转化无法与广告互动建立关联时，营销者应该采取下面哪一项行动？

When some conversions cannot be directly attributed to ad interactions, marketers should use modeled conversions. This approach uses statistical modeling to estimate the impact of advertising on conversions that cannot be directly observed, providing a more complete and accurate understanding of overall ad performance. Avoiding certain browsers or device types (second option) limits reach and doesn't solve the measurement gap. Relying on digital fingerprinting or alternative ID solutions (third option) often raises privacy concerns and may not be compliant with evolving privacy regulations. Constantly changing Smart Bidding campaigns daily (fourth option) disrupts the algorithm's learning process, leading to suboptimal performance rather than improved measurement.