It Is Late at Night,and David Is Studying for an Exam.David

question 98

Multiple Choice

It is late at night,and David is studying for an exam.David looks up and sees his older brother Jeff standing in his doorway.David speaks to him but gets no response.Jeff's eyes are open but he has a blank expression on his face,and Jeff shuffles his feet rather than walking normally.David follows him back to his room,and Jeff gets back into bed.David has just witnessed an episode of

• A) narcolepsy.
• B) somnambulism.
• C) REM behavior disorder.
• D) sleep terror disorder.

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Definitions:

Security Risk

The potential for a loss in value of an investment due to factors affecting the security itself or its issuer, such as default risk or market volatility.

Portfolio

A collection of financial investments like stocks, bonds, commodities, cash, and cash equivalents, including closed-end funds and exchange traded funds (ETFs).

Market Value Weighted-Average Beta

A calculation that averages the betas of all stocks in a portfolio, weighted by their market value.

Market Index

A statistical measure that tracks the performance of a basket of specific stocks to represent a particular market or sector.