For which of the following functions does f(−z)=−f(z) for all real number values of x?	Choose the most appropriate option.
A) z^8−z^4
B) z^5/(z^2+1)
C) z^5/z^7
D) z^9/(z^5+1)
E) z^8
all even root cannot be matched eliminated   put z=2   f(−z)=(−2)^5/(−2^)2+1=−32/5, and   −f(z)=−2^5/2^2+1=−32/5, for a match.   ANSWER: z^5/(z^2+1)
<result>B</result>
For which of the following functions does f(−z)=−f(z) for all real number values of x?