Question

which statement best describes common communicable diseases?
a. most communicable diseases are either bacterial or viral and infect the respiratory tract.
b. all communicable diseases are viruses that cause pneumonia.
c. most communicable disease are bacteria and viruses that infect the intestinal tract.
d. all communicable diseases are bacteria that grow in the respiratory tract.

please select the best answer from the choices provided.

○ a
○ b
○ c
○ d

Explanation:

• Option B is incorrect because not all communicable diseases are viruses, and they do not all cause pneumonia (e.g., bacterial infections like tuberculosis are communicable but not viral, and many cause non-pneumonia symptoms).
• Option C is incorrect because most common communicable diseases do not only infect the intestinal tract; respiratory infections are far more prevalent, and the statement incorrectly generalizes the site of infection.
• Option D is incorrect because not all communicable diseases are bacteria (many are viral, fungal, or parasitic), and they do not all grow in the respiratory tract.
• Option A is correct: The majority of common communicable diseases are either bacterial or viral, and the respiratory tract is the most common site of infection (e.g., the flu, colds, strep throat).

Answer:

A. Most communicable diseases are either bacterial or viral and infect the respiratory tract.