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Necessary to any investigation of the causes of a newly-discovered disease are strictly followed scientific methodologies and scrupulously recorded data.
A) Necessary to any investigation of
B) It is necessary in making any investigation into
C) When making any investigation, it is a necessity of
D) A necessity of any investigation into
E) A necessary part of investigating into
OA A
Source: Princeton Review
A) Necessary to any investigation of
B) It is necessary in making any investigation into
C) When making any investigation, it is a necessity of
D) A necessity of any investigation into
E) A necessary part of investigating into
OA A
Source: Princeton Review
