The connection of Singapore with high levels of short-sightedness is to prove that______.A
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The connection of Singapore with high levels of short-sightedness is to prove that______.
A．genetic factors play a more important role
B．environmental factors play a big role
C．both genetic factors and environment do harm to people
D．both genetic factors and environment have something to do with short-sightedness
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
语义理解题。句(3)中，首先介绍了科学家们认为环境是导致近视的重要因素，基因在其次。接着用新加坡是一个多种族的国家，可同样饱受着高近视率折磨的例子来证明上述结论。所以答案为B。