System Analysis and Design
An audit trial is

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

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

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

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