再請教一道文法題!

deepocean101

.One of the basic principles of wildlife conservation involves __ adequate natural food and shelter to maintain populations of each species in a given habitat.

(A)the provision

(B)that provision

(C)to provide

(D)providing

答案是D，可是為什麼C不行呢?又暈了.....

cpcjustin

fixed format: involve + n.  or involve with + n. or involve + doing

farsuccess

involve + n.

be/become/get involved in/with + doing