GRE Text Completion: Maggoosh-GRE填空Maggoosh - 7VP45ZJKZNP42600Y

Oncologists struggle to determine the long-term carcinogenic effects of basic household products, as these effects, whatever they may be, are ____________ those resulting from the miasma of toxins we breathe once we leave our homes. A. exacerbated by B. confounded with C. attenuated by D. obscured by E. displayed by F. subjected to