49. ( ) 儘管原物料價格上漲,我們仍維持原價。(譯成英文) (A)In spite of the rise in raw material prices, we maintain our existing prices. (B)Although prices of raw materials have decreased, we maintain our old prices. (C)Raw material prices have raised,but we maintain our existing prices. (D)Despite prices of raw materials have risen, our prices remain unchanged