16 設 A、B 及 C 為任三n × n矩陣，則下列敘述何者不恆真？（答案選項中 0 為零矩陣）
(A)若 rank A = n 且 AB = AC，則 B = C
(B)若 rank A = n 且 AB = 0，則 B = 0
(C)若rank A = rank B，則rank A2 = rank B2
(D)rank A = rank AT

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統計： A(0), B(3), C(0), D(0), E(0) #1047215