What's the answer??(SOMEONE PLEASE HELP ME)

Given :
F(x) = [tex]\frac{9}{5}x + 32[/tex]
C(x) = x - 273.15
We know that :
If f(x) and g(x) are Two Functions Defined under same Domain, then Composite Function : (f o g)(x) = f(g(x))
The Question is to find a Composite Function that can be used to convert Temperatures from degrees kelvin to degrees Fahrenheit
⇒ The Final Answer should be in Fahrenheit
⇒ The Question is to Find the Value of (F o C)(x)
⇒ (F o C)(x) = F(C(x))
⇒ [tex](F\;o\;C)(x) = F(x - 273.15)[/tex]
⇒ [tex](F\;o\;C)(x) = \frac{9}{5}(x - 273.15) + 32[/tex]
Last Option is the Answer