Hi Sage, isn't the sentence "Rather than paying the taxi fare, he walked home." wrong?

In the SC strategy guide, it is mentioned subordinators need to be a part of a clause (subject + verb). Here the part before the comma has no clause or verb.

I found the last line confusing. When I read the last time "Human benevolence may prove little better for these rhinos than past human maltreatment" I thought that the author is mentioning that humans interfere may prove better as there is hope for survival of the indonesian herd. After re...

Why is C incorrect?
The use of check lists helps to reduce errors (described by -ing verb) and as result of reduction of errors, money and lives are saved (described by -ing verb)