$.(3$ points$)$ Let C be the curve parameterized by:

$($

x$($t$)=$ sqrt$(2$ t$^2)$

y$($t$)=1+$ t$20$ t $2.$

What is the slope of the line tangent to the curve when t $=1?$

A$.2$

B$.1/2$

C$.1/2$

D$.2$

E$.0$