US GAAP for Converting an International Subsidiary's Accounts to the Parent's

U.S. GAAP for converting an international subsidiary's accounts to the parent's currency follow from what basic objective?

A) Minimize the impact on consolidated net income
B) Minimize the complexity of consolidation eliminating entries required
C) Preserve the subsidiary's financial performance as depicted in the parent's currency
D) Preserve the subsidiary's financial performance as depicted in its functional currency