The consultant should design the FlexCards as follows to meet the requirements:
Parent FlexCard with multiple Child Flex Cards and Card Actions. A Parent FlexCard is a construct in Financial Services Cloud that allows you to display information from one record in a card-like format on a Lightning page. A Child FlexCard is a construct in Financial Services Cloud that allows you to display information from related records in a card-like format within a Parent FlexCard. A Card Action is a construct in Financial Services Cloud that allows you to perform actions on a record from within a FlexCard, such as edit, delete, renew, or view details. You can use Parent FlexCards, Child FlexCards, and Card Actions to create an agent console that provides a 360-degree view of your customers and enables quick actions on their records. Verified Reference: : Salesforce Help Article [6] : Salesforce Help Article [7] : Salesforce Help Article [8]

The following statements about Action Plans are true:
When you work with Action Plans, you first create Action Plan Templates, which are reusable sets of tasks that define a common client process1.
Action Plans make it easy to create reports and dashboards, so you can monitor progress and ensure compliance. Users can use standard report types or custom report types to create reports on action plans, action plan templates, action plan items, action plan item templates, and action plan item owners1.
Action Plans can be used to automatically assign task owners and deadlines for specific client engagements. Users can specify task owners by using assignment logic such as specific user, role, queue, action plan creator, or account team1. Verified Reference: 1

If a client is associated with more than one Household or Group, their records will get rolled up to the household selected by the advisor for record rollups. A Household or Group is a construct in Financial Services Cloud that allows you to group related accounts together and view their aggregated financial data and activities. A client can belong to multiple Households or Groups, but only one of them can be selected as their primary Group for record rollups. The primary Group determines which Household or Group will display the client's records in its summary components or related lists. The advisor can select or change the primary Group for a client using the Primary Group field on the client's record page. Verified Reference: : Salesforce Help Article 6