ASAP Please!

1. Which of the following is labeled on the lines in an entity-relationship diagram?

A) relationships

B) entity types

C) entity instances

D) attributes

2. Which of the following guidelines should be followed when selecting an identifier?

A) Choose an identifier with values that will not change over time.

B) Choose an identifier that will not have null values.

C) Choose an identifier that is not composite.

D) all of the above