Equally at ease scrambling up the craggiest and treacherous mountain landscapes as perching on a ready-made barnyard knoll; the goat is considerably more adaptable than its cousin, the sheep.
A Equally at ease scrambling up the craggiest and treacherous mountain landscapes as perching on a ready-made barnyard knoll; the goat is
B The goat, as comfortable scrambling up the craggiest, most treacherous mountain landscapes as to perch on ready-made barnyard knolls, it is
C As comfortable when scrambling up the craggiest, treacherous mountain landscapes as when perching on ready-made barnyard knolls, goats are
D Equally at ease scrambling up the craggiest and most treacherous mountain landscapes as they are perching on ready-made barnyard knolls, goats are
E As comfortable scrambling up the craggiest, most treacherous mountain landscapes as perching on ready-made barnyard knolls, the goat is
我的看法：the craggiest and most treacherous两个最高级应平行，且分号应连接两个完整句子，排除A;
the goat后面无句子结构，排除B; its cousin说明goat为单数，排除CD; 所以选E