Question

which of the following best describes why someone with an immunodeficiency disorders may get sick more easily than someone without the disorder? part of the immune system does not function properly masses of cells form and steal nutrients from healthy cells healthy cells are mistaken for pathogens and get attacked

Explanation:

• For the option "masses of cells form and steal nutrients from healthy cells", this describes a tumor - like or parasitic - like behavior, not immunodeficiency. Immunodeficiency is about the immune system's inability to fight infections, not about cells stealing nutrients.
• For the option "healthy cells are mistaken for pathogens and get attacked", this is the definition of an autoimmune disorder, where the immune system attacks the body's own cells. Immunodeficiency is the opposite - the immune system is not working well enough to fight off foreign invaders.
• For the option "part of the immune system does not function properly", immunodeficiency disorders are defined as conditions where one or more components of the immune system (such as white blood cells, antibodies, etc.) do not function as they should. This leads to a decreased ability to fight off infections, so people with these disorders get sick more easily.

Answer:

A. part of the immune system does not function properly