Which of the following statement$(s)$ is/are correct?
$(i)$ Rich biodiversity is not essential for ecosystem health.
$(ii)$ The current rate of species extinction is $100$ to $1000$ times faster than the pre-human extinction rate.
$(iii)$ Steller's sea cow became extinct due to overexploitation by humans.
$(iv)$ Even if we combine all biodiversity hotspots,they cover less than $2 \%$ of the Earth's land area.
$(v)$ The rate of mass extinction can be completely reduced by strict protection of hotspots.

• A
  $i, ii, iii$ and $v$ are correct.
• B
  $ii, iii$ and $iv$ are correct.
• C
  $ii, iii, iv$ and $v$ are correct.
• D
  $i, ii$ and $v$ are correct.