Find the work done when a force $$F = \left( {\vec i + 2\vec j + 3\vec k} \right)N$$     acting on a particle takes it from the point $${{\vec r}_1} = \left( {\vec i + \vec j + \vec k} \right)m$$     to the point $${{\vec r}_2} = \left( {\vec i - \vec j + 2\vec k} \right)m$$

A. -3J

B. -1J

C. Zero

D. 2J

Answer: Option B