Question stem:State officials report that soaring
rates of liability insurance have risen to force cutbacks in the operations of everything from local governments and school districts to day-care centers and recreational facilities.
Detailed answerI see a lot of discussion on idiom
"rates of" vs "rates for", but we can tackle this question without having the knowledge of idiomatic expression.
Let's see why incorrect choices are incorrect.
(A) rates of liability insurance have risen to force
No grammatical error, but whenever we use infinitive it shows intention, here, rates of liability insurance have risen
to force, conveys an unintended meaning. Think: rates have risen to force something? Is it logical?
No -- So incorrect.(B) rates of liability insurance are a force for
No grammatical error. Plural subject "rates" matches with the plural verb "are". But again see the meaning. Present tense in GMAT is used only when we want to convey general/usual fact. Here "rates of liability insurance
are a force for" conveys an unintended meaning i.e
rates of liability insurance are always a force for... Incorrect.(C) rates for liability insurance are forcing
Perfect. Use of present progressive tense seems logical here, conveys an intended meaning. - Correct(D) rises in liability insurance rates are forcing
Incorrect. Just replace the underlined part in the question with this one and see the mess it creates. soaring rises in....
soaring and rises redundant and illogical also.(E) liability insurance rates have risen to force
Incorrect. Same as A.
Hope this helps.