Final answer:
The correct statement regarding infectious diseases is 'c) 30% of the world population carry TB', as estimated by the CDC with TB being a significant global health concern.
Step-by-step explanation:
The statement 'c) 30% of the world population carry TB' is true regarding infectious diseases. Tuberculosis (TB) is one of the deadliest diseases caused by the bacterium Mycobacterium tuberculosis. The Centers for Disease Control and Prevention (CDC) estimates that about one-third of the world's population is infected with Mycobacterium tuberculosis. Public health initiatives, such as vaccination programs and better healthcare, have had a significant impact on controlling the spread of infectious diseases. Despite advances in medical research, infectious diseases remain a leading cause of death globally.