WASHINGTON (AP) — U.S. retail sales rose modestly in January, evidence that Americans kept shopping despite sharp drops in stock prices. A key question for the economy this year is whether consumer spending can keep growing and offset the impacts of stock market volatility and slowing growth overseas. On Wednesday, the National Retail Federation forecast above average sales this year, citing better hiring and wage increases, as well as lower gas prices. Cheap gas is dragging down the overall retail sales figures, which include gas but don't account for price changes.