Given the common challenges in email marketing with Mailchimp, evaluate the following scenarios. Which scenarios correctly address overcoming these challenges?
- Scenario A: Increasing the frequency of emails to improve engagement without changing the email content or segmentation strategy.
- Scenario B: Regularly reviewing and cleaning the email list to maintain a high-quality subscriber base and improve deliverability.
- Scenario C: Segmenting the email list based on user behavior and interests to create more personalized and targeted campaigns.
- Scenario D: Creating a content calendar to plan diverse and relevant email content in advance, incorporating industry trends and user feedback.
Select all the scenarios that demonstrate effective strategies to overcome common Mailchimp challenges.