Although all sedimentary rocks contain iron, (but the deposits) that (are richest) in iron (consist) predominantly of minerals (

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问题 Although all sedimentary rocks contain iron, (but the deposits) that (are richest) in iron (consist) predominantly of minerals (such as) iron oxides, carbonates, silicates, and sulfides.

选项 A、but the deposits
B、are richest
C、consist
D、such as