Researchers measured average heart rate (bpm) of four animal species at rest and during peak exertion: Mouse, 500 (rest), 800 (peak); Rabbit, 200, 320; Dog, 90, 250; Elephant, 30, 100. Researchers concluded that smaller animals have higher heart rates at both rest and peak exertion. The strongest data support for this claim is ______
Which choice most logically completes the text using the data above?
- A
Rabbit's intermediate rates.
- B
Elephant's rest rate of 30 bpm.
- Ccheck_circle
the size-rate inverse pattern: rates rise from elephant (30 rest) to mouse (500 rest), and similarly from elephant peak (100) to mouse peak (800).
- D
Mouse's peak rate of 800 bpm.
Explanation
The claim is about both rest and peak rates scaling with body size. Choice B captures the inverse size-rate pattern at both states, the strongest support for the dual claim.