How should the syntax in this sentence be changed, if at all? The scientist spent years analyzing the results of numerous medical studies meant to identify the cause of the disease.

A) no change
B) the scientist spent years looking at the results of a variety of the different medical studies meant to located the cause of the disease.
C) the scientist spent years reviewing medical study results to find the cause of the disease.
D) the scientist spent years studying the results of many medical studies in order to uncover the cause of the disease.