【正确答案】 C

【答案解析】[理由] so as to V 为了要……
=in order to V
[例] I got up early so as to catch the first train.
=I got up early in order to catch the first train.
(我早起是为了赶乘第一班的火车。)
in order to V 为了要……
with a view to+V-ing 为了要……(to在此处为介词，之后接动名词作其宾语)
=with an eye to+V-ing
=for the purpose of+V-ing
[例] I got up early with a view to catching the first train.
(我早起是为了赶乘第一班的火车。)
so that+S+助动词(如：can、will、may等)+V 为了要……
=in order that+S+助动词(如：can、will、may等)+V
根据上述，原句空格后有动名词saving，故知(C)应为正选。