OG 16 逻辑97 求助

杀八头猪

Most of the year, the hermit thrush, a North American songbird, eats a diet consisting mainly of insects, but in autumn, as the thrushes migrate to their Central and South American wintering grounds, they feed almost exclusively on wild berries. Wild berries, however, are not as rich in calories as insects, yet thrushes need to consume plenty of calories in order to complete their migration. One possible explanation is that berries contain other nutrients that thrushes need for migration and that insects lack.Which of the following, if true, most seriously calls into question the explanation given for the thrush’s diet during migration?


正确选项是C. For songbirds, catching insects requires the expenditure of significantly more calories than eating wild berries does.
但是我困惑的是D. Along the hermit thrushes' migration rotes, insects are abundant throughout the migration season.


D的意思不是在说在迁移的路上有很多insects 所以这个鸟就可以吃这个虫子 而不是果子中的其他营养帮助他们迁移的吗



是我的理解有问题吗？D为什么不对啊？


谢谢大神们

19930613

为啥木有选项。。。是欺负我木有看OG16么

newconcept123

D is irrelevant.
It can't explain why BERRIES contain sufficient nutrient for songbird to migrate.