Maintenance activities include（74）.

①making enhancements to software products

②developing a new software product

③correcting problems

④adapting products to new environments

（74）

A．①②

B．①③④

C．②③④

D．①②③④

[单选题]Maintenance activities include(74)。①making enhancements to software products②developing a new software product③correcting problems④adapting products to new environmentsA．①②B．①③④C．②③④D．①②③④

[单选题]Maintenance activities do not include (74).(74)A． making enhancements to software productsB． developing a new software productC． correcting problemsD． adapting products to new environments

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You are now to write a proposal, whichmay include its aim, duration, participant

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