Looking at a Entity-Relationship diagram, why may there be more than one relationship between any given pair of entities (for instance between autobiography and reader)?

Select one:

A. It represents a Many:Many relationship that must be resolved into two 1:M relationships

B. The relationship is shown both ways (1:M, normally in the active sense; and the M:1, normally in the passive sense)

C. The relationship may have a synonym or alias

D. There may be more than one relationship involved

During detailed design ___________ and ___________ are specified.

Select one:

A. algorithms, data structures

B. modules, interconnections

C. subsystems, modules

D. architecture, human computer interactions (HCI)

When a change is made to a product to react to changes in the environment such as a change in the telephone directory codes, is an example of ________ maintenance:

Select one:

A. corrective

B. perfective

C. adaptive

D. none of the above