List the Elements from a That Belong to the Set $\mathrm{A}=\left\{-\sqrt{6},-6,-0.09,0, \sqrt{4}, \frac{21}{3}, 3, \sqrt{-4}\right\}$

Multiple Choice

List the elements from A that belong to the set.
- $\mathrm{A}=\left\{-\sqrt{6},-6,-0.09,0, \sqrt{4}, \frac{21}{3}, 3, \sqrt{-4}\right\}$
Rational numbers

A) $-6,-0.09,0, \sqrt{4}$ (or 2 ) , $\frac{21}{3}$ (or 7 ) , 3
B) $0, \sqrt{4}$ (or 2 ) , $\frac{21}{3}$ (or 7 ) , 3
C) $-6,0, \sqrt{4}$ (or 2 ) , $\frac{21}{3}$ (or 7 ) , 3
D) $-6,-0.09,0, \frac{21}{3}$ (or 7 $) , 3$