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Title: Incomplete explanations
Review: Explanations are often incomplete, only explaining why some (not all) of the wrong answer choices are incorrect. Unfortunately, this seems to be most common when there are a couple answer choices that both might be good options--it is in these situations where an explanation of why one answer is better than the other is most important, and it is in these situations where the "second choice" answer is conspicuously absent. For example, this book states that methadone is the best option for treating a heroine addiction, but even though buprenorphine is one of the answer choices no explanation is given as to why methadone would be a better choice.
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