8
Answer: CSet 5: Command of Evidence
Explanation
PASSAGE
Vaccines work by exposing the immune system to a weakened or inactive form of a pathogen. This allows the body to develop antibodies without suffering the disease. If the person later encounters the real pathogen, their immune system can respond quickly.
Why can vaccinated individuals respond quickly to real pathogens?
A. The vaccine cures the disease after infection.
B. Their immune system has already developed antibodies from the vaccine.
C. Vaccines contain live, fully active pathogens.✓ Correct
D. Vaccines eliminate all pathogens from the environment.
Detailed Explanation
The vaccine allows the body to 'develop antibodies. ' Later, the immune system 'can respond quickly' because it already has these antibodies.
Key Evidence:
• "develop antibodies"
• "respond quickly"
Why others are wrong: A (Vaccines PREVENT, not cure.), C (They contain 'weakened or inactive' forms.), D (Vaccines work on the body, not the environment.).