To Convert a Celsius Temperature to a Fahrenheit Temperature, We $\frac{9}{5}$

Multiple Choice

To convert a Celsius temperature to a Fahrenheit temperature, we multiply the Celsius temperature by $\frac{9}{5}$ and add 32 to the result. When the temperature is $40^{\circ} \mathrm{C}$ , what is the temperature in degrees Fahrenheit?

A) $104^{\circ} \mathrm{F}$
B) $129.6^{\circ} \mathrm{F}$
C) $78.4^{\circ} \mathrm{F}$
D) $54.0^{\circ} \mathrm{F}$