The old black woman sat under the pine tree, her grandsons, ______ around her, ______ to an old story.[ ]

A. seating; listening

B. seated; listened

C. seating; listened

D. seated; listening

思一思．澳大利亚被称为“坐在矿车上”的国家，我国每年都要从澳大利亚进口大量的矿石．请你深入分析这一说法背后蕴含的地理事实（从三个方面回答即可）．