New illnesses will develop. Doctors will visit their patients at home. More families will move closer to hospitals. Many illnesses will be prevented or cured.
I gave my students this multiple choice question: In what way does society benefit from research on diseases?

Only one answer is correct among these 4 choices:
- New illnesses will develop.
- Doctors will visit their patients at home.
- More families will move closer to hospitals.
- Many illnesses will be prevented or cured.

Could you tell me which one is correct?

Many illnesses will be prevented or cured.