Determine whether the given matrix is regular. Explain your answer. P= 14 - 13 1|5 45 O Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. It is not regular. There is no power of P that contains only strictly positive entries. B. It is regular. The first power of P that contains only strictly positive entries is P OC. It is regular. All the columns sum to 1 and the matrix is invertible. OD. It is not regular. All the columns sum to 1 but the matrix is not invertible.

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