System Analysis and Design
The advantage of Purchase Option is (are)

Insurances, maintenance, and other expenses are included in the rental charge
No financing is requird. The risk of system obsolescence is shifted to the lessor
All of these
None of these
the flexibility of modifying the system at will

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System Analysis and Design
An audit trial is

None of these
post-auditing the system after its implementation
designed to permit tracing of any input record or process performed on a system, back toits original sources
All of these
test data used by the system auditor

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System Analysis and Design
Advantages of Relational Database Management systems are

All of these
Flexibility, of relating different logical files
None of these
Data independence since it allows the database to grow by adding new attributes and relations.
Security controls can be more easily implemented.

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