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

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

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System Analysis and Design
A square symbols

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

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System Analysis and Design
The approach used in top-down analysis and and design is

None of these
to prepare flowcharts after programming has been completed
to identify the top level functions by combining many smaller components into a single entity.
to identify a top level function and then create a hierarchy of lower level modules and components
All of these

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