黃金閱讀 Deer Populations of the Puget Sound 答案疑惑 - 英檢

麻煩各位大大們，我爬文查過Q2以前正確答案似乎是3，

不過現在勇版黃金閱讀的正確答案卻是2，有沒有哪位大大可以替小弟解惑一下。

Paragraph 2: Nearly any kind of plant of the forest understory can be part of
a deer's diet. Where the forest inhibits the growth of grass and other meadow
plants, the black-tailed deer browses on huckleberry, salad, dogwood, and
almost any other shrub or herb. But this is fair-weather feeding. What keeps
the black-tailed deer alive in the harsher seasons of plant decay and dormancy?
One compensation for not hibernating is the built-in urge to migrate. Deer may
move from high-elevation browse areas in summer down to the lowland areas in
late fall. Even with snow on the ground, the high bushy understory is exposed;
also snow and wind bring down leafy branches of cedar, hemlock, red alder, and
other arboreal fodder.

2. It can be inferred from the discussion in paragraph 2 that winter
conditions
○ Cause some deer to hibernate
○ Make food unavailable in the highlands for deer
○ Make it easier for deer to locate understory plants
○ Prevent deer from migrating during the winter

我個人這題是寫2，原因是我用What keeps the black-tailed deer
alive in the harsher seasons of plant decay and dormancy?
來推論deer冬天在highlands食物unavailable，所以才要migrate，
不是因為冬天使低地更容易找到食物才migrate到低地。而且我也沒看到
冬天"使"低地"更容易"找到食物的暗示或換句話說，只是說在低地，即使冬天，還是
因為有些植物會露出或是被snow and wind帶下來，所以還是有食物的。


煩請大大們解惑!


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