History: Which range of our hearing is the weakest?

Which range of our hearing is the weakest?

• Below 100 Hz and above 10,000 Hz.
  Good job!
• None of the other answers.
  One of the answers is a good option.
• Between 1.5 kHz and 5 kHz.
  This is the strongest part of our hearing ability.
• Around 3.5 kHz.
  This isn't a range.