GMAT Sentence Correction (SC) | According to research covering the last decade, the average number of

According to research covering the last decade, the average number of rooms added by high-end hotel chains waslower than what the hotel industry average did for this period, but their occupancy and room rates grew faster than the average hotel.

(A)than what the hotel industryaverage did for this period, but their occupancy and room rates grew faster than

(B)than the hotel industry average for this period, but occupancy and room rates grewfaster for these chainsthan for

(C) as compared
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