The Area of the Surface $\mathbf { r } ( u , v ) = 2 \cos u \mathbf { i } + 2 \sin u \mathbf { j } + v \mathbf { k }$

Multiple Choice

The area of the surface $\mathbf { r } ( u , v ) = 2 \cos u \mathbf { i } + 2 \sin u \mathbf { j } + v \mathbf { k }$ , where is

A) 24?
B) 18?
C) 12?
D) 6?
E) 3?