19.在BASIC中，用 OPEN"MY.DAT" FOR INPUT AS #2 開檔後，假定已順利地讀出資料，用下列那一個敘述可成功地關檔
(A)CLOSE"MY.DAT" FOR INPUT AS #2
(B)CLOSE"MY.DAT" AS #2
(C)CLOSE "MY.DAT" FOR INPUT
(D)CLOSE #2

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統計： A(15), B(24), C(15), D(35), E(0) #789163