List All the Elements of Set B That Belong to the Indicated

Multiple Choice

List all the elements of set B that belong to the indicated set.
- $$\mathrm { B } = \left\{ 4 , \sqrt { 8 } , - 21,0 , \frac { 0 } { 6 } , \sqrt { 9 } \right\}$$
Integers

A) $4,0 , \sqrt { 9 }$
B) $4 , - 21,0$
C) $4 , - 21,0 , \frac { 0 } { 6 } , \sqrt { 9 }$
D) 4,0