The vector area of triangle position vectors of whose vertices are `veca,vecb,vecc` is
A. `(vecA.(vecBxx vecC) + vecB. (vecC xx vecA)+ vecC. (vecAxxvecB))/(3)`
B. `vecA.(vecB xx vecC)`
C. `(vecA xx vecB + vecBxx vecC +vecC xx vecA)/(6)`
D. `vecA xx (vecB xx vecC)`