ASAP please. A=Host B=infectious agent C=portal of exit D=portal of entry

In between B and C is reservoir. In between C and D is transmission.

A nurse becomes infected when she breathes in the bacteria that cause the disease tuberculosis. As she becomes sick, she starts to cough and releases some of that bacteria. Examine the diagram below that shows the chain of infection regarding this nurse.

What do the labels A, B, C, and D represent in the case of this nurse?

A is the nurse, B is tuberculosis, C is the bacteria, and D is the mouth.

A is tuberculosis, B is the nurse, C is the mouth, and D is the mouth.

A is the bacteria, B is the nurse, C is the mouth, and D is tuberculosis.

A is the nurse, B is the bacteria, C is the mouth, and D is the mouth.