The food compartment of a refrigerator is maintained at $3$ C by removing heat from it at a rate of $6$ kJ$/$s$.$ If the required power input to the refrigerator is $2\mathrm{.}5$ kW$,$ the rate of heat rejection to the room that houses the refrigerator is

Select one:

a$.7\mathrm{.}5$ kw

b$.8\mathrm{.}5$ kw

c$.2\mathrm{.}4$ kw

d$.5\mathrm{.}5$ kw