Despite Persistent Education Worldwide About Preventing the Spread of Acquired

Despite persistent education worldwide about preventing the spread of acquired immunodeficiency syndrome (AIDS) ,what may be a cause of increased cases?

A) Translating the importance to other countries has proven difficult because of language barriers.
B) New strains of AIDS have developed because of increased global travel,proving it difficult to contain and fight.
C) Lack of customary standards of living across the world varies widely,leaving the doors open to the development of AIDS.
D) Cases have actually begun to decline,so education has had a vast impact.