Find the Torsion of the Space Curve $\tau = 0$ B) $\tau = 1$

Multiple Choice

Find the torsion of the space curve.
-r(t) = (5t sin t + 5 cos t) i + (5t cos t) - 5 sin t) j - 6k

A) $\tau = 0$
B) $\tau = 1$
C) Undefined
D) $\tau = - 1$