Simplify the Fraction to Lowest Terms $\frac { 4 } { 7 }$

Multiple Choice

Simplify the fraction to lowest terms. $\frac { 4 } { 7 }$

A) $0.4$
B) $\frac { 2 } { 7 }$
C) $\frac { 2 } { 4 }$
D) $\frac { 7 } { 4 }$
E) Does not simplify further.