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Twins Are Obviously Very Close

question 28

Multiple Choice

Twins are obviously very close. They share not only genes but friends, bedrooms, and even secrets. But might it be possible that they share thoughts-without even opening their mouths? Many twins-as many as 20%-claim to share something far more mysterious: a special psychic connection. Take the case of Gemma Houghton. In 2009, she had the strange feeling that her sister Leanne desperately needed her help. So she walked upstairs to the bathroom, where she found Leanne unconscious in a bathtub full of water. She had suffered a seizure had nearly drowned. Fortunately, Gemma arrived in time to save her sister. But as inexplicable as this may seem, perhaps it's not so mysterious after all. Leanne had had seizures in the past and Gemma had been warned to watch out for her. Knowing that it was dangerous for Leanne to be alone in water, it's not surprising that Gemma might have become concerned for her after a few minutes of hearing no activity from upstairs. It's likely that any other family member would have acted just as Gemma did.
Based on their titles, which of the following articles would provide the most reliable information for a student who wanted to know the real reason for supposed psychic connection between twins?

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The point at which total revenues and total expenses are equal, resulting in no net loss or gain.

Monthly Dollar Sales

The total sales revenue earned by a business within a month, measured in dollars.

Variable Expenses

Costs that change in proportion to the activity of a business, such as sales or production levels.

Fixed Expenses

Costs that do not change in total despite fluctuations in the volume of goods or services produced or sold.