Mount Everest Rises to a Height of 8 $\times$ 10³ M Above Sea Level

Mount Everest rises to a height of 8.850 $\times$ 10³ m above sea level.At this height,the atmospheric pressure is 231 mm Hg.At what temperature (in ^$\circ$ C) does water boil at the summit of Mount Everest? The vapor pressure of water at 373 K is 760.0 mm Hg.( $\Delta$ _vap ^$\circ$ for H₂O = 40.7 kJ/mol and R = 8.314 J/K.mol)

A) 4.07 ^$\circ$ C
B) 69.0 ^$\circ$ C
C) 72 ^$\circ$ C
D) 87 ^$\circ$ C
E) 364 ^$\circ$ C