GKFix MCQ Question

Given A = Axî + Ayĵ + Azk̂ and B = Bxî + Byĵ + Bzk̂, what is A·B?

• A. Ax By + Ay Bz + Az Bx
• B. Ax + Bx + Ay + By + Az + Bz
• C. Ax Bx + Ay By + Az Bz
• D. (Ax + Ay + Az)(Bx + By + Bz)