Q4

The equation of the curve in 3-dimensional space below is

A. $x=t^2$, $y=t$, $z=0$

B. $x=0$, $y=t^2$, $z=t$

C. $x=0$, $y=t$, $z=t^2$

D. $x=t^2$, $y=t^2$, $z=0$