A whale emits sound waves with frequency $5\,\text{Hz}$. The waves are picked up by a microphone and shown on an oscilloscope. What value should be chosen for the oscilloscope time-base?
- A$0.1\,\text{ms div}^{-1}$
- B$1\,\text{ms div}^{-1}$
- C$10\,\text{ms div}^{-1}$
- D$100\,\text{ms div}^{-1}$