Question

a person who has allergies has a compromised immune system because the bodys immune system attacks its healthy cells. overreacts to an antigen. steals nutrients from healthy cells. responds to mutagens.

Explanation:

To solve this, we analyze each option:

• "attacks its healthy cells" describes autoimmune diseases, not allergies.
• "overreacts to an antigen" is correct for allergies, as allergens (antigens) trigger an excessive immune response.
• "steals nutrients from healthy cells" is not related to immune system function in allergies.
• "responds to mutagens" relates to DNA damage responses, not allergies.

Answer:

B. overreacts to an antigen.