A rigid insulated tank $A$ contains water at $400$ $kPa$, $800^{\circ}$$C$. $A$ pipe and valve connect this to another rigid insulated tank $B$ of equal volume having saturated water vapor at $100$ $kPa$. The valve is opened and stays open while the water in the two tanks comes to a uniform final state. Which two properties determine the final state?

A. $v= 1.694$ $m^3/kg$ ; $u=2506$ $kJ/kg$
B. $v= 1.237$ $m^3/kg$ ; $u=3662.5$ $kJ/kg$
C. $v= 1.430$ $m^3/kg$ ; $u=3174.3$ $kJ/kg$
D. $v= 1.53$ $m^3/kg$ ; $u=2600$ $kJ/kg$