求助 GWD

lei881009

The artist Renoir’s last word was “flowers”, spoken as they arranged a bouquet of roses just picked from his garden in a vase on his bedroom windowsill.

(A)  as they arranged a bouquet of roses just picked from his garden

(B)   as a bouquet of roses had been just picked from his garden and was being

(C)   as a bouquet of roses just picked from his garden was being arranged

(D)  during the arrangement of a bouquet of roses just picked from his garden

(E)   while they arranged a bouquet of roses that had just been picked from his garden

为什么选c阿？

Caribou are wary animals with excellent hearing, so talking them over the treeless landscape, getting close enough to kill it with nothing but a handheld lance, as Dorset people did, required exceptional hunting skill.

(A)  so talking them over the treeless landscape, getting close enough to kill it

(B)   so to stalk them over the treeless landscape and get close enough to kill one

(C)   so in order to stalk them over the treeless landscape and get close enough to kill one

(D)  and so in order to stalk it over the treeless landscape, getting close enough to kill it

(E)   and so stalking them over the treeless landscape and getting close enough in order to kill it

为什么是B啊

xxxyyyzzz1

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第一题不明白
请指教

第二题
先根据it的指代排除ADE,因为前面的animals是复数而且句子想表达的是其中一部分，并非整体，直接加and逻辑上不同，而且DE也没有平行对称的结构体现，in order to 逻辑也不对，表示目的，这里没有在这个意思，so。。。as。。。表示像xxx一样，B中平行并列的很好

虽然我也不确定so to do ...as 是怎么来的，但是可以排除掉其他选项。
还请大家讨论下