In the Function $f(x)=2 x+d$ , What Must Be the Value D, If

Multiple Choice

In the function $f(x) =2 x+d$ , what must be the value d, if $f(3) =1$ ?

A) $d=7$
B) $d=5$
C) $d=-5$
D) $d=-1$
E) $d=-7$