Speed Inc. is a courier company. It delivers letters, parcels, and other items to their desired
destination. The company wants to create a database that keeps the records of items received,
items delivered, and also the information about any undelivered item. A table named Courierdetail
has the following attributes:
CustomerName
Address
ContactNumber
DateOfReceiving
DeliveryAcknowledgement
Which of the above-mentioned attributes can be designated as the primary key?
A.
CustomerName
B.
None of the attributes can be designated as the primary key.
C.
Address
D.
ContactNumber