Question: Why should class' input methods not prompt the user for what to type? ( I thought a program should always prompt the user for what

Why should class' input methods not prompt the user for what to type? (I thought a program should always prompt the user for what to type...)
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a
it is the main application's responsibility
b
we don't know the scenario surrounding this call to our method
c
we don't know what the user will be typing
d
it keeps us generic and re-usable across multiple applications
e
we don't know what type of data is being input

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