The correct answer is B because the requirement is about making a Samples option appear in the Life Sciences mobile app sidebar, not about adding a related list to a Salesforce desktop page. Salesforce Help for setting up the Life Sciences Cloud mobile app specifically includes tasks for configuring the Visit Engagement Page and the Sidebar Menu. Salesforce also states that mobile app configuration changes are handled through the Life Sciences Commercial app's Admin Console and mobile configuration areas, with metadata cache used to sync configuration to the mobile device.

The Samples tab is part of the mobile visit engagement experience. Enabling the relevant Samples sidebar setting in Mobile App Settings makes the Samples entry available in the sidebar so reps can record sample disbursements during a visit. This is the correct configuration approach because it controls the mobile navigation and visit sidebar behavior.

Option A is incorrect because adding the Product Disbursements related list affects a record page layout, but it does not create the mobile sidebar tab required by the field sales team. Option C is also incorrect because simply placing a Lightning web component on the Visit Lightning record page does not necessarily add a Samples entry to the Life Sciences mobile sidebar menu. The consultant should enable the Samples sidebar setting in Mobile App Settings.

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