to test research methods used by other scientists to develop questions about space research to discuss the meaning of new discoveries to explain gas properties to the general public
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: A meeting of scientists, called a symposium, occurs every year to share recent research about the atmosphere of Earth. This symposium mainly serves which purpose in science?
Possibilities:
- to test research methods used by other scientists
- to develop questions about space research
- to discuss the meaning of new discoveries
- to explain gas properties to the general public

to discuss the meaning of new discoveries