Official Explanation:Split-#.1: the split. On the one hand, there's no comma separating "report' and
suggesting that the modifier is a and the general word "report' also seems to require a vital noun
modifier for identity. At the same time, the writer might feel that the construction "report that demonstrated that" is
a little redundant. which might justify the word "which". An argument could be made either way, so this is not a clear
split.
Split #2: we are counting children, so we need "many", not "much' ;how many children?", not "how much
children?" Furthermore, the correct idiom is "as as X out of N". Choices (A) & (C) use "much', so those are
incorrect.
Splits: the word "that' after the verb "demonstrated' introduces a clause that needs a full [noun] + [verb] structure.
Choice (B) has a participle, "living", rather than a full bonafide verb, so this commits (B) is
incorrect.
Split-#4: in the idiom, "as many as one out of eight children", the subject, "many", is plural, and so we need the plural
verb "live". Choices (C) & (E) make the mistake Of using the singular verb, "lives."
Choice (D) is the only possible answer.