If the Capital-Output Ratio Is Three,the Full-Employment GDP Is $5,100

If the capital-output ratio is three,the full-employment GDP is $5,100 billion,and intended investment is $750 billion,then a $60 billion increase in intended investment will increase full-employment GDP by ________ billion.

A) $250
B) $180
C) $60
D) $50
E) $20