A 4×44 \times 44×4 matrix CCC has rank 2. Which statement must be TRUE?
det(C)=2\det(C) = 2det(C)=2
det(C)=0\det(C) = 0det(C)=0
det(C)>0\det(C) > 0det(C)>0
det(C)=1\det(C) = 1det(C)=1