Which sentence is not false?

(a)    Policies that improve the productive capacity of the economy constitute examples of demand-side policies.

(b)    Monetary policy is an example of a supply-side policy.

(c)   According to the quantity equation the higher the government budget deficit, the larger the crowding out effect on private expenditure.

(d)    The classical dichotomy expresses a view on the relationship between real variables and nominal variables.