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16. Consider the following table in a relational database RoomShift 234Mornin Last Name Rank Smith Jones Smith Doe Manager Custodian33 Afternoon Custodian 33 Evenin 222

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16. Consider the following table in a relational database RoomShift 234Mornin Last Name Rank Smith Jones Smith Doe Manager Custodian33 Afternoon Custodian 33 Evenin 222 Mornin Clerical According to the data shown in the table, which of the following could be a candidate key of the table? (A) {Last Name (B) Room) (C) Shift (D) Rank, Room) (E) {Room, Shift

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