I choose B; increase作动词;increase in时increase是名词;见例子
(From GRE/GMAT/LSAT CR; RC)
Increase infficeffice" />
A short-term increase in the number of those in poverty can indicate a shortage of jobs because the basic number of those unable to accept employment remains approximately constant.
despite the increase in rice production among their tenant farmers
an increase in the proportion of female members has accompanied the occupational shift and has altered union policy-making in favor of organizing women and addressing women’s issues.
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