You need to design the primary key for DynamoDB based on three attributes. What do you do?
a. Designate all three fields as the primary key.
b. Concatenate all three fields into one new field, then designate that new field as the primary key.
c. Designate two fields of the three fields as the primary key.
d. Concatenate two fields into one new field, then designate that new field and the remaining field as the primary key.
