D is correct.
Hope this helps and please give brainliest!
Answer: No, his experiment is not designed correctly.
Explanation: He didn't use the same measurements in each experiment. He should've either buried them all in the yard, or she should've kept them all in pots. Not having them in the same environment could affect the results of his experiment, thus making it inaccurate.
1.) Monitored
Becuase it is in thier pooint of view
