The best option for the BA to suggest is to ask the support manager to wait until the idea is released. This option avoids spending time and resources on building a custom solution that may not be compatible or necessary once the idea is released. It also ensures that the support team can benefit from the latest features and functionality that Salesforce provides, and avoid potential issues or conflicts with future updates or releases. The other options are either impractical or risky. Option B may not be possible or feasible, as the idea may not be ready or stable for early release. Option C may result in wasted effort or duplication, as the custom solution may become obsolete or incompatible once the idea is released. References: https://trailhead.
salesforce.com/en/content/learn/modules/business-analysis-functional-requirements/evaluate-solution-options