Command of Evidence: Quantitative

SAT Reading and Writing· difficulty 2/5

A researcher measured the average wingspan (in cm) of four bird species: Species I, 22; II, 28; III, 33; IV, 71. She concluded that Species IV is much larger than the others. The strongest support is ______

Which choice most logically completes the text using the data above?

A
$Species II's wingspan of 28.$
B
$the average wingspan.$
C
$Species I's wingspan of 22.$
D
$Species IV's wingspan of 71, more than 2x the next-largest species.$
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Explanation

"Much larger than the others" is supported by IV's 2x ratio. Choice B captures it.

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