As people ______ more wealth, they tend to spend a greater proportion of their incomes.

【正确答案】 C

【答案解析】 动词词义辨析。accommodate“容纳；使适应；调解”；accelerate“使……加快；使……增速”；accumulate“积累”；accomplish“完成”。空格动词修饰“more wealth”(更多财富)，accumulate符合语境，故答案为C。