The Cooling Requirements for the Three Separate Incubation Rooms Are $\frac { 1 } { 5 }$

Multiple Choice

The cooling requirements for the three separate incubation rooms are $\frac { 1 } { 5 }$ ton, $\frac { 5 } { 6 }$ ton and $\frac { 25 } { 36 }$ ton. If a central HVAC unit will be installed, how many tons are required?

A) $1 \frac { 131 } { 180 }$ tons
B) $1 \frac { 1 } { 30 }$ tons
C) $1 \frac { 786 } { 1,081 }$ tons
D) $1 \frac { 41 } { 270 }$ tons
E) $1 \frac { 132 } { 181 }$ tons