Search Ads 360 suddenly starts defaulting to a previously generated basic linear attribution model to track conversions instead of using the data-driven attribution model you set up last week. Why might that be happening?

• Because there are too many keywords included in the bid strategy.
• Because the number of clicks and conversions falls below the data requirements.
• Because the model was created during the bid strategies learning period.
• Because historical data is transferring to the new model created.

The correct answer is:

• Because the number of clicks and conversions falls below the data requirements.