Given the employee table and the data that it contains, and assuming that you have the rights to modify the table, which of the following ALTER TABLE statements would create an error?

a$.)$

ALTER TABLE employee

ALTER COLUMN city TYPE VARCHAR $(100)$;

b$.)$

ALTER TABLE employee

ALTER COLUMN state VARCHAR $(50)$;

c$.)$

ALTER TABLE employee

ALTER COLUMN postal$\_$code TYPE VARCHAR $(100)$;

d$.)$

ALTER TABLE employee

ALTER COLUMN email TYPE VARCHAR $(100)$;Given the employee table and the data that it contains, and assuming that you have the rights to modify the table, which of the following ALTER TABLE statements would create an error?

a$.)$

ALTER TABLE employee

ALTER COLUMN city TYPE VARCHAR $(100)$;

b$.)$

ALTER TABLE employee

ALTER COLUMN state VARCHAR $(50)$;

c$.)$

ALTER TABLE employee

ALTER COLUMN postal$\_$code TYPE VARCHAR $(100)$;

d$.)$

ALTER TABLE employee

ALTER COLUMN email TYPE VARCHAR $(100)$;