Question

ゆゆゆ

高3文系、英文法について質問です
この問題で、③が答えになるのはなぜですか？

94
In that country the possibility of a woman ever ( ) prime minister is
総理 た臣
SOremote as to be almost non-existent..
( 使位い
became
19とAの becomes
3 becoming So-as to
(将度)へする(ほど.
(早稲田大)
のwill become
⑤ become