77. Refer to the above data. Gross investment is $8 billion, net exports are $4 billion, and government collects a lump-sum tax of $30 billion and spends $30 billion. Assume all taxes are personal taxes and that government spending does not entail shifts in the consumption and investment schedules. The equilibrium GDP will be: A. $280 billion B. $290 billion C. $300 billion D. $310 billion C.+1+ X+G C+1+X. 140 C +1 120 C C+6+X+G 100 45 100 200 300 100 GDP ($8)