A family is consistently spending more than they earn and wants to gain control over their variable expenses. A financial counselor advises them to use the 'envelope system.' What is the primary principle of this budgeting method?
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A
Using a budgeting app to automatically track all credit and debit card spending.
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B
Allocating cash to labeled envelopes for specific spending categories and stopping when an envelope is empty.
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C
Investing a fixed percentage of income automatically at the beginning of each month.
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D
Paying only the minimum amount on all debts to maximize monthly cash flow.