句子简化题解题方法于保留原句的意思，逻辑关系不变，关键词（主干）不变，从句可被替换甚至去除，但主句必须保留
★保留原句主干
Continued sedimentation—the process of deposits’ settling on the sea bottom—buries the organic matter and subjects it to higher temperatures and pressures, which convert the organic matter to oil and gas.
1. Which of the sentences below best expresses the essential inf
ormation in the highlighted sentence in the passage?
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