Which Is a Major Controversy Regarding the Federal Highway Trust

Which is a major controversy regarding the Federal Highway Trust Fund?

A) whether the remaining portions of the federal suburban highway system will ever be built
B) whether it is legitimate to collect federal excise taxes on road tires
C) whether taxes should still be collected since the interstate highway system is 96 percent complete and it is doubtful if the remaining 4 percent will be constructed
D) whether states should obtain revenues through vehicle registration fees that are assessed on a vehicle weight basis