If a table is created and it is later determined that additional fields should be added to the table, it is usually preferable to
a) delete the existing table and re-create it with the additional fields
b) create a parallel table that holds just the additional fields
c) re-define an existing field in the table to hold the additional data
d) delete the entire database and start over
e) alter the table to add the additional fields
e) alter the table to add the additional fields
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