The command "MODIFY TABLE guests' CHANGE fname' name varchar(20);" will Select one or more: a Change the first name of all users in the database Db. Affect only guests with first names Oc Change the field name for the field 'name' d. Produce an error e Change the field name for the field frame and field size to variable character of 20 length Database management systems are intended to ... Choose four(4) Select one or more: a. Maintain data integrity b. Maintain data redundancy c. Establish relationship among records in different tables Ed. Eliminate data redundancy Manage table access