College

Barbara is converting [tex]$78^{\circ} F$[/tex] to degrees Celsius. First, she subtracts 32 from 78. What is the next step?

A. Multiply 46 by [tex]$5/9$[/tex]
B. Multiply 46 by [tex][tex]$9/5$[/tex][/tex]
C. Add 273 to 46
D. Subtract 273 from 46