If $r_1, r_2$ and $r_3$ represent the most probable speeds of three different gases at the same temperature as shown in the figure,with molar masses $M_1, M_2$ and $M_3$ respectively,what is the correct order of the molar masses of these gases?
- A$M_1 > M_3 > M_2$
- B$M_3 > M_2 > M_1$
- C$M_2 > M_1 > M_3$
- D$M_2 > M_3 > M_1$
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