If a 4×44 \times 44×4 matrix AAA has det(A)=0\det(A) = 0det(A)=0, what can be inferred about its rank?
rank(A)=4rank(A) = 4rank(A)=4
rank(A)<4rank(A) < 4rank(A)<4
rank(A)=0rank(A) = 0rank(A)=0
rank(A)≥2rank(A) \geq 2rank(A)≥2