According to the passage, when a few harmful chemicals combine, they can

Question

Option 1: cause us to experience allergies.

Option 2: cause a monumental task for homeowners.

Option 3: contribute to a syndrome called Multiple Chemical Sensitivity.

Option 4: contribute to photosynthesis in plants

AfterBoards · Accepted Answer

**Option 3: contribute to a syndrome called Multiple Chemical Sensitivity** is correct. The passage tells us that when a few harmful chemicals combine (mix together), they can lead to a condition called Multiple Chemical Sensitivity (MCS). This is a syndrome (a group of health problems that happen together) where a person's body becomes very sensitive to chemicals, even in tiny amounts. For example, someone with MCS might feel dizzy, get headaches, or feel sick just from smelling cleaning products or paint. **Why the other options are wrong:** **Option 1** – The passage does not say that combining harmful chemicals causes allergies. Allergies are reactions to things like dust or pollen, which is different. **Option 2** – "A monumental task for homeowners" may appear in the passage, but it describes something else — not the result of chemicals mixing together. **Option 4** – Photosynthesis is how plants make food from sunlight. It has nothing to do with harmful chemicals combining.

According to the passage, when a few harmful chemicals combine, they can

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