Database design and manegment

please answer the question

7. Students and classes have a. relationship.

a. one-to-one

b. one-to-many

c. many-to-one

d. many-to-many

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8. Referential..dictates that the foreign key must contain values that match the primary key in the related table, or must contain null.

a. integrity

b. uniqueness

c. model

d. attribute

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9. The .. relationship is the relational model ideal.

a. 1:1

b. 1:M

c. M:1

d. M:N

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10. Information about tables in the database is kept:

a.	in the system catalog
b.	in each table in the database
c.	in each row of each table in the database
d.	in an external file