In Guidewire PCF configuration, making a page or popup editable requires a combination of page-level properties and widget-level settings. According to the PCF Architecture and Dynamic UI lessons, thestartInEditModeproperty (Option B) is a critical page-level setting. When a popup is intended to collect data immediately upon opening—such as a new inquiry—setting startInEditMode to true ensures the user doesn't have to manually click an "Edit" button to begin typing. This property governs the initial state of the UI container.

At the widget level, individual fields must be capable of receiving input. In Guidewire,Input widgets(such as TextInput, DateInput, or RangeInput) are used to display and modify data. For these widgets to allow user interaction, theireditableproperty must be set to true (Option E). While the parent container (like a Detail View) often has an editable property that can be bound to a variable or expression, the individual widgets must also be configured to allow data entry to fulfill the business requirement of an "editable" inquiry page.

Options like adding a custom boolean variable (Option A) are unnecessary because Guidewire provides built-in state management. readOnly (Option C) is generally an expression-based property used to lock fields under specific conditions, rather than a primary way to enable editing. InputSet (Option F) does not have a canEdit property that controls the entire set in that specific manner; instead, editability is typically inherited or controlled via the editable property on the container or the inputs themselves. Following these best practices ensures that the BillingCenter UI remains consistent with Guidewire's declarative UI model.