Question: When you run your Windows Form application, what is the lifespan of a global variable (also known as a field or class variable)? a.during the

When you run your Windows Form application, what is the lifespan of a global variable (also known as a "field" or "class" variable)?

a.during the initial click button event

b.global variables only exist if they are constants

c.only until any additional classes are initialized

d.as long as the form is running

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