Which of the Following Is NOT True of Cephalosporins

Which of the following is NOT true of cephalosporins?

A) First- and second-generation medications are relatively expensive and for this reason are not used often.
B) Uses of the generations are related to the type of microorganism involved in the infection.
C) Cephalosporins are used for persons who are allergic to penicillins.
D) Microbes that are drug-resistant to penicillin are usually resistant to cephalosporins.
E) Penicillins are more potent with each generation, while cephalosporins work on a different wide-spectrum of microbes.