You hired an employee on January 1, 2023.

Full Detailed In-Depth Explanation:

In Oracle HCM Cloud, the Person Quick Action (e.g., Change Name) updates the global person record, which is separate from assignment records. When an HR specialist changes an employee’s last name via Person Quick Action and specifies an effective date (e.g., the marriage date, June 12, 2023), this date applies to the person record. The documentation states that name changes can be backdated to reflect life events, and if the "Synchronize to Assignments" option is enabled (default behavior unless overridden), the updated name also propagates to all active assignments with the same effective date—here, June 12, 2023. The assignment’s original start date (January 1, 2023) remains unchanged unless explicitly modified via a separate transaction (e.g., Manage Employment).

Option A introduces an arbitrary August 15 date, which has no basis. Option B uses July 11 (request date) for Person, ignoring the backdated request, and January 1 for Assignment, which doesn’t reflect synchronization. Option D keeps Assignment at January 1, contradicting the synchronization default. Option C correctly sets both Person and Assignment to June 12, 2023, per Oracle’s name change and synchronization behavior.