Question

an infectious disease is caused by a particle that can
be shared between people through a drug.
treat a medical condition.
cause cancer cells to grow.
be transmitted from person to person.

Explanation:

An infectious disease is caused by a pathogen (the "particle" here) that can be transmitted from person to person. Let's analyze each option:

• Option 1: "be shared between people through a drug" – Infectious diseases are not typically shared via drugs; this is incorrect.
• Option 2: "treat a medical condition" – The pathogen causing an infectious disease is not for treating a condition; this is incorrect.
• Option 3: "cause cancer cells to grow" – Most infectious disease - causing agents don't directly cause cancer cell growth (though some may be associated with cancer, but this is not the defining feature of an infectious disease); this is incorrect.
• Option 4: "be transmitted from person to person" – This is a key characteristic of infectious diseases, as they spread from one individual to another through various means (like airborne, contact, etc.).

Answer:

D. be transmitted from person to person. (Note: Assuming the options are labeled A - D in order, with the fourth option being D. If the original labeling is different, adjust the identifier accordingly, but the text of the option is "be transmitted from person to person".)