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.
B because it talks about expressing individuality.
Ok so here are the three sentences it leads up to.
The mission was accomplished.
A dog got in her way.
The mission was finished in 15 minutes.
