As a campaign manager, you're leading the creative development for a new marketing campaign. Evaluate the relevance of the following actions in the stages of the creative development process:
- Action I: Initiating a brainstorming session right after finalizing the creative brief to develop the campaign's core theme.
- Action II: Beginning the design of ad visuals and content immediately, bypassing a formal conceptualization phase.
- Action III: Soliciting feedback from a variety of stakeholders, including marketing and sales, on the initial design concepts.
- Action IV: Implementing A/B testing on different versions of ad designs to assess audience response before the official campaign launch.
Identify which actions align correctly with the stages of creative development in campaign planning.