9. What was the scientists' hypothesis concerning lake plant growth in Experiment 1 ?
Your Answer is
Correct Answer is A
Explanation
A method of elimination can be used. First of all, the runoff (surface runoff) in option B is not involved in Experiment 1, so exclude it;
The rain falling in option C is also not within the scope of Experiment 1, and exclude it;
The lake sediment of option D is also not within the research scope of Experiment 1, excluded