The easiest policy to identify is the following one:
2. The government limits the number of foreign cars that can be sold in the United States. This is a protectionist policy - it directly deals with protecting the local market from the other markets.
Now, 3. The government decreases the interest rate on loans charged to car companies.
This is monetary policy: those are often targeting the interest rates.
which means that
the fiscal policy would be represented by 1.The government goes into debt to buy a large number of vehicles for the military.