Determine if the following vectors are orthogonal. 12 U= 5 V = 5 13 . . Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a simplified fraction.) O A. The vectors u and v are not orthogonal because u . v = O B. The vectors u and v are not orthogonal because u + v = O C. The vectors u and v are orthogonal because u . V = O D. The vectors u and v are orthogonal because u + v =