請英文大大幫我看一下這題文法題 ~很難喔

應該選D.
因為後面的主要結構是：the decision is based largely on price
但decision這個名詞給了兩個選項to sonsume和to save，我們應看這兩項為decision的同位語，因為內容是與其等值的．而這兩個不定詞用whether ... or連接起來．表示必須二選一，如果把這個句子所省略的字都補上，就可更清楚看出是同位關係了：the decision whether we should consume one thing or we should not consume one thing is based largely on price.即〔要買不買的決定是取決於價格〕．所以不能用why，因為重點是〔做選擇〕而不是〔為什麼〕．

(D) WHETHER"或者"

重點在於"決定" 需要選一個 "省錢" 或 "花錢"

如果是"why" 翻譯變成

取決於為什麼省錢或花錢 價格是最大因素

變成重點在於"為什麼" 不在於"決定"

用D不是很好嗎?
Anything that is not consumed is, by definition saved; and the decisionwhether to consume or to save is based largely on price.
紅字的部份剛好成為一個句型
by definition=>
because of its own features
任何一種不被消費的因素是節省的考慮，而要省或要買大都取決於價格

Anything that is not consumed is, by definition saved; and the decision _THAT_ to consume or to save is based largely on price.

沒被消耗的任何事是，藉著被解救的定義； 而且決定消費或者對救援在價格上主要地被建立。


Anything that is not consumed is, by definition saved; and the decision _WHY_ to consume or to save is based largely on price.

沒被消耗的任何事是，藉著被解救的定義； 而且決定為什麼該消費或者對救援在價格上主要地被建立。


Anything that is not consumed is, by definition saved; and the decision _IF_ to consume or to save is based largely on price.

沒被消耗的任何事是，藉著被解救的定義； 而且決定如果消費或者對救援在價格上主要地被建立。


Anything that is not consumed is, by definition saved; and the decision _WHETHER_ to consume or to save is based largely on price.

沒被消耗的任何事是，藉著被解救的定義； 而且決定是否消費或者對救援在價格上主要地被建立。


個人也覺得應該是b