Mrs.Wilson is 78 years old and over the past few years she has become increasingly susceptible to pneumonia.This can most clearly be attributed to

A) slower neural processing.
B) a weakening immune system.
C) the brain's plasticity.
D) neurogenesis.

Weakening Immune System

A decrease in the effectiveness of the immune system, which reduces the body's ability to fight off infections and diseases.

Susceptible To Pneumonia

Having an increased vulnerability or tendency to develop pneumonia, an infectious disease affecting the lungs.

Slower Neural Processing

A reduced speed in the cognitive processing of information by the nervous system.