modifier to be used is researchers
left with option A , C & E
C) researchers have established that
they are absorbed into the bloodstream at far more concentrations than the Food and Drug Administration’s safety threshold. usage of they is wrong as it refers to researchers not the ingredients
E) researchers have established that these chemicals are absorbed into the bloodstream at concentrations far
more than that of the Food and Drug Administration’s safety threshold ; quantity verb error ; since ingredients are a quantifiable parameter usage of more than is wrong
A) researchers have established that these chemicals are absorbed into the bloodstream at concentrations far greater than the Food and Drug Administration’s safety threshold.OPTION A is correct
generis
Project SC Butler: Sentence Correction (SC1)
For SC butler Questions Click HereIn what is the third such study of common sunscreen ingredients,
researchers have established that these chemicals are absorbed into the bloodstream at concentrations far greater than the Food and Drug Administration’s safety threshold.A) researchers have established that these chemicals are absorbed into the bloodstream at concentrations far greater than the Food and Drug Administration’s safety threshold.
B) it has been established by researchers that these chemicals are absorbed into the bloodstream at concentrations far more than the Food and Drug Administration’s safety threshold.
C) researchers have established that they are absorbed into the bloodstream at far more concentrations than the Food and Drug Administration’s safety threshold.
D) it has been established by researchers that they are absorbed into the bloodstream at far greater concentrations than those of the Food and Drug Administration’s safety threshold.
E) researchers have established that these chemicals are absorbed into the bloodstream at concentrations far more than that of the Food and Drug Administration’s safety threshold.