GMAT Sentence Correction (SC) | Re: The delinquency rates on mortgages for office buildings,

726.The delinquency rates on mortgages for office buildings, hotels, shopping malls, and other commercial properties held by the nation’s insurance companiesin recent months have increased sharply, leading to predictions that foreclosures on these types of loan could double over the next three years.
(A) in recent months have increased sharply, leading to predictions that foreclosures on these types of loan could double over the next three years
(B) have increased sharply in recent months,