Determine Which Numbers in the Set Are Rational Numbers $- 1.5252 \ldots , 16 , \frac { 2 } { 3 } \pi , \sqrt { 5 } , \frac { 7 } { 2 } , 4.070070007 \ldots , \sqrt { 81 }$

Multiple Choice

Determine which numbers in the set are rational numbers. $- 1.5252 \ldots , 16 , \frac { 2 } { 3 } \pi , \sqrt { 5 } , \frac { 7 } { 2 } , 4.070070007 \ldots , \sqrt { 81 }$

A) $- 1.5252 \ldots , 16 , \frac { 7 } { 2 } , 4.070070007 \ldots$
B) $- 1.5252 \ldots , 16 , \frac { 7 } { 2 } , 4.070070007 \ldots , \sqrt { 81 }$
C) $16 , \sqrt { 5 } , \frac { 7 } { 2 } , \sqrt { 81 }$
D) $- 1.5252 \ldots , 16 , \frac { 7 } { 2 } , \sqrt { 81 }$
E) $- 1.5252 \ldots , 16 , \frac { 2 } { 3 } \pi , \frac { 7 } { 2 }$