$A \rightarrow$ products ($1^{st}$ order reaction). Three sets of experiment were performed for a reaction under similar experimental conditions. Run $1 \Rightarrow 100 \ mL$ of $10 \ M$ solution of reactant $A$. Run $2 \Rightarrow 200 \ mL$ of $10 \ M$ solution of reactant $A$. Run $3 \Rightarrow 100 \ mL$ of $10 \ M$ solution of reactant $A + 100 \ mL$ of $H_2O$ added. The correct variation of rate of reaction is:

• A
  Run $1 = $ Run $2 = $ Run $3$
• B
  Run $3 < $ Run $1 = $ Run $2$
• C
  Run $3 < $ Run $1 < $ Run $2$
• D
  Run $1 < $ Run $2 < $ Run $3$