When the U. S. dollar​ depreciates, it is predicted that A. U. S. firms and individuals will immediately change from foreign sources of import to domestic sources of products. B. the U. S. current account will worsen in the short run​ (become more​ negative), and improve in the long run. C. the relative price of U. S. imports will decrease. D. the U. S. current will improve a little bit in the short run​ (become more​ positive), and improve substantially in the long run.