Answer:
b. right by $70 billion
Step-by-step explanation:
The computation of the amount that shift to the aggregate demand curve is shown below;
= Multiplier × government purchase - crowding out effect
= 5 × $20 billion - $30 billion
= $100 billion - $30 billion
= $70 billion
So it would right by $70 billion
hence, the correct option is b,
The other options seems incorrect