Sangwook on December 29, 2014
I know why (E) is the answer, but I am still doubt why (C) couldn't be an answer for this question. Let me write out my understanding about a choice (C):
"Not all substances to which people can become physically addicted are psychoactive." ===> "Some substances to which....are NOT psychoactive."
(1)As far as I'm concerned, I don't find "caffein" is defined as psychoactive substance either explicitly or implicitly on the stimulus.
(2)According to the first sentence, caffeine is "as physically addictive as other psychoactive substances."
Therefore, I come to the conclusion that there is AT LEAST one physically addictive substance which is not psychoactive. So I am wondering why (C) couldn't be an answer.
Please help me out.
Melody on December 29, 2014