请教og-10-119

running2k

119. Executives and federal officials say that the use of crack and cocaine is growing rapidly among work­ers, significantly compounding the effects of drug and alcohol abuse, which already are a cost to busi­ness of more than $100 billion a year.



(B)   significantly compounding the effects of drug and alcohol abuse, which already cost busi­ness

OG explains: significantly compounding modifies growing? I don't get it. Looks to me that Compounding modify clause "the use of ... is growing...worker, "

Please help clarify...Thank you

AlienX

either way is fine. ;-)

running2k

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