Given below are two statements regarding evolution.
$Statement-I$: Isolation is the separation of a population of a particular species into smaller units, which prevents interbreeding between them.
$Statement-II$: Due to isolating mechanisms, divergence and speciation do not occur.
In the light of the above statements, choose the most appropriate answer from the options given below.

• A
  Both $Statement-I$ and $Statement-II$ are correct.
• B
  $Statement-I$ is correct but $Statement-II$ is incorrect.
• C
  Both $Statement-I$ and $Statement-II$ are incorrect.
• D
  $Statement-I$ is incorrect but $Statement-II$ is correct.