viewed images are clearer operation is less complex ability to see through clouds and dust ability to take up less space
I gave my students this multiple choice question: What advantage is gained by using radio telescopes as opposed to optical telescopes?

Only one answer is correct among these 4 choices:
- viewed images are clearer
- operation is less complex
- ability to see through clouds and dust
- ability to take up less space

Could you tell me which one is correct?

ability to see through clouds and dust