Which of the following represents the correct relationship between the change in density of an ideal gas and the change in temperature?

• A
  $d_2 = d_1 \left( \frac{T_1 P_2}{T_2 P_1} \right)$
• B
  $d_2 = d_1 \left( \frac{T_1 T_2}{P_2 P_1} \right)$
• C
  $d_2 = d_1 \left( \frac{T_1 P_1}{P_2 T_2} \right)$
• D
  $d_2 = d_1 \left( \frac{T_2 P_2}{P_1 T_1} \right)$