Consider被動文法

題目為... Although it is considered _____ to establish a perfect food security system, many challenges still remain. A. feasible B. feasibility C. feasibly D. feasibleness 書本給的答案為A, 但consider的被動用法不是It is considered +受詞補語 +to不定詞 受詞補語的詞性也有包括形容詞,分詞以及名詞 那為何答案不能選擇B和D同為名詞的受詞補語呢??? 是因為他是不可數的原因嗎??? ... 顯示更多 題目為...
Although it is considered _____ to establish a perfect food security system, many challenges still remain.

A. feasible
B. feasibility
C. feasibly
D. feasibleness

書本給的答案為A, 但consider的被動用法不是It is considered +受詞補語 +to不定詞
受詞補語的詞性也有包括形容詞,分詞以及名詞
那為何答案不能選擇B和D同為名詞的受詞補語呢???
是因為他是不可數的原因嗎??? 受詞補語的名詞有規定一定要可數名詞並為複數嗎??

先在此感謝好心人的解答 :)
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