请问B为什么对，不完整吧

问题如下：

Which of the following statements is the most appropriate description of gross domestic product (GDP)?

选项：

A.

The total income earned by all households, firms, and the government whose value can be verified.

B.

The total amount spent on all final goods and services produced within the economy over a given time period.

C.

The total market value of resalable and final goods and services produced within the economy over a given time period.

解释：

B is correct.

GDP is the total amount spent on all final goods and services produced within the economy over a specific period of time.

考点：GDP定义

解析：B的说法从支出法定义出发，最符合GDP定义。

A说法没有定义一个段具体的时间段，并且只说商品的价值可以明确，却没有规定必须要用市场价值，所以不够准确。

C说法包含了再销售的商品，不正确。