Find the Arc Length of the Space Curve Given by the Vector

Multiple Choice

Find the arc length of the space curve given by the vector equation r = t i + 2ln(t) j +(1 - ) k, 1 $\le$ t $\le$ 2.

A) 1 + 2ln(4) units
B) unit
C) 2 units
D) 1 unit
E) 3 units