Let A be an n × n matrix obeying the equation: A^2 = A

Let A be an n × n matrix obeying the equation: A2 = A

Which of the following is not correct:

(A) The value of |A| lies between 0 and 1
(B) 0 is the only possible value for |A|
(C) 1 is the only possible value for |A|
(D) Both 0 and 1 are the only possible values of |A|

A
B
C
D
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