The company known for its benevolence and community-involvement has donated over $100,000 to charity over the last twenty years and will continue to do it as long as it is financially able.

a - same
b- will continue to do that as long as it is financially able
c- will continue to do so as long as it is financially able
d- will continue to do it as long as the company is financially able
e- will continue to do it as long as they are financially are

[spoiler]OA : C[/spoiler]
Please tell me why the answer cannot be B
that as a relative pronoun would refer back to donate