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The DNS system amounts to: O a single physical database composed of multiple logical databases 0 a single logical database composed of a single physical database 0 multiple logical databases composed of a single physical database 0 a single logical database composed of multiple physical databases Question 8 1 pts The database computer language that underlies the relational database is Question 9 1 pts DBMS stands for Question 10 1 pts A query in Access isLet (A )KEN be a sequence of sets, and let B be a set. Prove the following propositions. FI 27. Vm, neN, ifm