$\text {The hydroturbine shown accepts water at \(4 \mathrm { MPa }\) and}$

$\text {The hydroturbine shown accepts water at \(4 \mathrm { MPa }\) and}$$\text { exits to the atmosphere. If the flow rate is \(2 \mathrm {~m} ^ { 3 } / \mathrm { s }\) , the}$ $\text {maximum power output is nearest:}$

A) $80 \mathrm { MW }$
B) $70 \mathrm { MW }$
C) $60 \mathrm { MW }$
D) $50 \mathrm { MW }$