单选题 The many diagrams ______ George Hamilton"s latest book are useful in helping readers understand the economic theory described in it.
【正确答案】 B
【答案解析】[解析] 词汇：介词
1．这是一道词汇题，选项均为介词。
2．空格后的latest book是单本书，因此among排除。介词through表示一个领域的全部，因而B项为正确选项。