Participating in a marketing plan alone can lead to which of the following scenarios?

Participating in a marketing plan alone can lead to a decrease in ad visibility for users when there is not enough collaboration and integration with other marketing efforts. If a marketing strategy is executed in isolation, it may not take full advantage of synergies available from various channels. This lack of coordination can result in ads being shown less frequently or to less relevant audiences, ultimately reducing the visibility and effectiveness of the advertising efforts.

In contrast, other scenarios would typically arise from a more collaborative and comprehensive approach. Increased collaboration usually leads to improvements in attribution models and user engagement, as well as potentially more strategic budget allocations across channels. However, without the integration of various marketing efforts, focusing solely on a single marketing plan can hinder performance metrics like visibility.