Human beings can hear sound frequencies ranging from 20Hz to 20,000Hz. However, the upper limit generally decreases with age. Other animals can perceive vibrations higher than 20,000 Hz. For example, a dog’s frequency range extends higher than 20,000 Hz.
Which among the following cannot be concluded from the above paragraph?
A. Hearing ability differs among the animal kingdom
B. Many animals can hear more sounds than a human does
C. Hearing ability is not the same during one’s lifetime
D. Animals can hear things that humans can’t hear