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

All of these
None of these
the flexibility of modifying the system at will
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

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System Analysis and Design
A square symbols

identifies data flow
represents a process that transforms incoming data flow(s) into outgoing data flows
None of these
defines a source or destination of system data
is a data store-data at rest, or a temporary repository of data

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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
test data used by the system auditor
All of these

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