Suppose the current level of income is $600 billion, "the" multiplier is 4, the marginal tax rate is 20 percent, and the current budget deficit is $20 billion. If government spending is increased to raise income to $630b, once equilibrium is attained the budget deficit will be
a) $20b or less
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b) more than $20b but less than $22b
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c) at least $22b but less than $27b
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d) $27b or more
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