$f(0)=0,f(-1)$ must be

The derivative, $f^{\text{'}},$ of a function $f$ is given by $f^{\text{'}}(x)=x^2-1$ for xinR. What must be true about $f?$

a$)f$ attains a minimum value at $x=-1.$

$f^{\text{'}}(x)=0p^{\text{i}\text{s}\text{t}\text{t}}$

attains a maximum value at $x=-1.$

c$)f$ attains a minimum value at $x=0.$

$f^{\text{'}\text{'}}($ point $)mi{n}_{\text{m}\text{a}\text{x}}$

d$)f$ attains a maximum value at $x=0.$

e$)$ None of the answers.

$f^{\text{'}}(x)=2x$

max is negtive Volue