identifying experimental variables forming a question that is the basis of a hypothesis conducting repeated trials and graphing the data writing out a procedure and collecting the needed equipment
I gave my students this multiple choice question: Which of the following is the starting point for a new scientific investigation?

Only one answer is correct among these 4 choices:
- identifying experimental variables
- forming a question that is the basis of a hypothesis
- conducting repeated trials and graphing the data
- writing out a procedure and collecting the needed equipment

Could you tell me which one is correct?

forming a question that is the basis of a hypothesis