Which of the following is incorrect regarding the conversion of $N_2$ and $O_2$ into their respective monocations $N_2^+$ and $O_2^+$?

• A
  In $N_2^+$,the $N-N$ bond becomes weaker.
• B
  In $O_2^+$,the $O-O$ bond order increases.
• C
  In $O_2^+$,the paramagnetic property decreases.
• D
  $N_2^+$ becomes paramagnetic.