Find the Curvature of the Curve $\mathbf { r } ( t ) = 2 t \mathbf { i } + 6 t \mathbf { j } + 9 \mathbf { k }$

Multiple Choice

Find the curvature of the curve $\mathbf { r } ( t ) = 2 t \mathbf { i } + 6 t \mathbf { j } + 9 \mathbf { k }$
Select the correct answer.

A) 1
B) $2 \sqrt { 10 }$
C) 11
D) 0