$A$ commercial sample of $H_2O_2$ marked as $100$ volume hydrogen peroxide means:

• A
  $1 \ mL$ of $H_2O_2$ will give $100 \ mL$ of $O_2$ at $STP$
• B
  $1 \ L$ of $H_2O_2$ will give $100 \ mL$ of $O_2$ at $STP$
• C
  $1 \ L$ of $H_2O_2$ will give $22.4 \ L$ of $O_2$ at $STP$
• D
  $1 \ mL$ of $H_2O_2$ will give $1 \ mole$ of $O_2$ at $STP$