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.
- $$B = \left\{ 10 , \sqrt { 6 } , - 21,0 , \frac { 0 } { 5 } , \sqrt { 4 } , \frac { - 8 } { 0 } , 0.27 \right\}$$
Rational numbers

A) $10,0 , \sqrt { 4 }$
B) $10 , - 21,0 , \frac { 0 } { 5 } , \sqrt { 4 } , 0.27$
C) $\sqrt { 6 } , \sqrt { 4 }$
D) $\sqrt { 6 } , \frac { 0 } { 5 } , 0.27$