单选题
The author mentions the example of tackling deficiencies in iron and iodine to show the importance of ______.
A、
mutually reinforcing advances
B、
a healthy, educated and secure mother
C、
health and brain development of children
D、
equality of a mother's role and a father's role
【正确答案】
A
【答案解析】
细节题。本题需要把握第五段第一句、本段的主题句Progress in one area contributes to progress in others，并知道其他句子都是为主题句服务的。
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