Strong growth in emerging markets, raising prices and offering consumers more options of popular items helped Procter & Gamble Co. post a nearly 9% increase in its fiscal first quarter, the consumer products maker said Wednesday. But P&G dropped the low end of its earnings guidance for the full fiscal year, facing slower sales amid volatility in commodity and energy markets and in foreign exchange. The maker of household products such as Tide detergent, Pampers diapers and Olay ski...