The Diagram Below Shows Supply and Demand Diagrams (S and D)for

The diagram below shows supply and demand diagrams (S and D) for some product.The government then imposes an excise tax.The new supply curve is ST.
FIGURE 18- 4
-One efficiency- based argument in favour of government subsidies for post- secondary education is that

A) there are positive externalities involved in the consumption of education.
B) very few benefits from an individual's education accrue to society as a whole.
C) the subsidy is essentially a transfer from lower- income,non- university- trained taxpayers to potentially higher- income- earning university students.
D) they would encourage people not to seek employment.
E) relative to the federal contribution,the provincial contribution to higher education is too low.