Which of the Following Cases Best Represents a Class Action

Which of the following cases best represents a class action suit?

A) A customer sues a manufacturer on behalf of every consumer who bought a certain defective good.
B) A white man sues a public university because he believes that he was denied admission based on his race.
C) The federal government files charges against every member of an alleged criminal organization.
D) A private business sues the federal government on the grounds that its regulatory standards place an undue financial burden on the company.
E) A citizen sues the state in which she lives on the grounds that its public facilities do not adequately accommodate her individual physical needs.