Find The $( r + 1 )$ Th Term in the Binomial Expansion

Find the $( r + 1 )$ th term in the binomial expansion.
$$( x + b ) ^ { n }$$

A) $\quad \frac { n ! } { ( n - r ! ( r + 1 ) ! } x ^ { n - r - 1 } b ^ { r + 1 }$
B) $\frac { n ! } { ( n - r - 1 ) ! ( r + 1 ) ! } x ^ { n - r - 1 } b ^ { r + 1 }$
C) $\frac { n ! } { ( n - r ) ! r ! } x ^ { n - r } b ^ { r }$
D) $\frac { n ! } { ( n + r - 1 ) ! ( r + 1 ) ! } x ^ { n + r - 1 } b ^ { r + 1 }$
E) $\frac { n ! } { ( n - r ) ! r ! } x ^ { n - r + 1 } b ^ { r - 1 }$