Which of the Following Expressions Is a Polynomial?
A) $4 x ^ { - 2 } + 4 x ^ { 5 } - 8$

Multiple Choice

Which of the following expressions is a polynomial?

A) $4 x ^ { - 2 } + 4 x ^ { 5 } - 8$
B) $\frac { 5 } { 4 } x ^ { 2 } + 4 x - 2$
C) $8 x ^ { \frac { 1 } { 2 } } - 4 x ^ { 2 }$
D) $\frac { 4 } { x ^ { 2 } } - 2 x$