Analyze the following scenarios related to the use of PPC tools in scaling advertising campaigns. Identify which scenarios demonstrate effective implementation and use of these tools:
- Scenario I: A marketing team dynamically adjusts their PPC campaign bids based on evolving performance data and changes in user demographics.
- Scenario II: An eCommerce brand primarily targets high-volume keywords for their PPC campaigns, aiming to maximize traffic to their product pages.
- Scenario III: A company incorporates regular A/B testing for ad copy and landing pages, applying the insights gained to refine their PPC strategy.
Select the scenarios that reflect effective use of PPC tools in scaling campaigns.