According to the Keynesian-cross analysis, when there is a shift upward in the government-purchases schedule by an amount DG and the planned expenditure schedule by an equal amount, then equilibrium income rises by:
A) one unit
B) ▲G
C) ▲G divided by the quantity one minus the marginal propensity to consume
D) ▲G multiplied by the quantity one plus the marginal propensity to consume

Alaska king crab fishing in the 1960s and '70s was a dangerous but rich fishery. boats from as far away as california and japan braved the treacherous gulf of alaska crossing to reach the abundant king crab beds in cook inlet and bristol bay. suddenly, in the early 1980s, the fishery crashed due to over fishing. all crabbing in those areas ended. to this day, there is no crabbing in bristol bay or cook inlet. a. how would an economist explain the decline of the alaska king crab fishery