For many years it was thought that it was enough to produce goods and supply services.

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问题 For many years it was thought that it was enough to produce goods and supply services.

选项 A、许多年以来，它被认为是生产商品和提供服务。
B、许多年以来，人们认为应该生产足够多的商品和提供足够的服务。
C、许多年以来，人们以为生产商品和提供服务就足够了。
D、许多年以来，人们认为应该有好的商品和服务。