If the multiplier of an open private economy equals 5, a $ 20 billion increase in net exports will result in:

Select one:

to. an increase of $ 20 billion in the level of real GDP.

b. a reduction of $ 4 billion in the level of real GDP.

c. an increase of $ 100 billion in the level of real GDP.

d. a reduction of $ 100 billion in the level of real GDP.