Consider the following two statements $A$ and $B$ and identify the correct choice in the given answers.
$A$. Paramagnetism is explained by domain theory.
$B$. Susceptibility of a diamagnetic substance is independent of temperature.

• A
  Both $A$ and $B$ are correct
• B
  Both $A$ and $B$ are wrong
• C
  $A$ is correct and $B$ is wrong
• D
  $A$ is wrong and $B$ is correct