Crux of the argument: low number of articles was due to the decline in availability of particle accelerators.
The best way to counter to counter is to show that the number of articles came down not because of the lack of availability of particle acccelerators but some oterh reason. E does that.
First Rule: 'Consider(ed) as' is not the correct idiom
So this rules out A/D
B gives the meaning that brown rice is not available
E is funny in saying that most Japanese are unavaiable outside Yokohama
Leaves us with C.
Gmat168,
IMO B is wrong as it doesnot matter if they used it/not. That is outside the premise.. BUt it very well explains the problem which then rules out..as we are looking for least explaining choice
What say?