Congress adopted a law granting a state university $2.5 million to study the properties of snowflakes. An outraged taxpayer filed suit to challenge the appropriation. Which of the following is the best argument against this challenge? a. The legislation is a valid exercise of the federal taxing and spending powers.
b. The federal court lacks jurisdiction to enjoin such expenditures voted by Congress, under the doctrine of separation of powers.
c. The taxpayer lacks standing to challenge the expenditure.
d. There is no diversity in this suit because the spending appropriation being challenged is federal, and the plaintiff is a citizen of the United States.