Find the Curvature of the Space Curve $\kappa = \sinh ^ { 2 } t$

Multiple Choice

Find the curvature of the space curve.
-r(t) = ti + (sinh t) j + (cosh t) k

A) $\kappa = \sinh ^ { 2 } t$
B) $\kappa = \cosh ^ { 2 } t$
C) $\kappa = \frac { \tanh ^ { 2 } \mathrm { t } } { 2 }$
D) $\kappa = \frac { \operatorname { sech } ^ { 2 } \mathrm { t } } { 2 }$