Recall Application 3, "Is a VAT in Our Future?" to Answer

Recall Application 3, "Is a VAT in our Future?" to answer the following questions.
-According to the application, what is the difficulty in imposing VAT in the U.S.?

A) Some conservatives oppose the tax because the VAT is regressive.
B) Some liberals oppose the tax because the VAT is too efficient.
C) The US already imposes retail level taxes collected by state governments.
D) The VAT is a lot more difficult to collect than sales taxes.